Prefer to talk? Call us on 01903 692 214, Mon - Fri 08.30 to 17.30

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Frequently Asked Questions

Here you can find answers to the most common enquiries we receive, which makes it quite long - but please scan through to see if it answers your question as it may save you the trouble of calling or sending an email.

Thumbs Up imageReasons to trust us

Dear Customer,

With a customer base encompassing local government, NHS Trusts, Schools, Colleges and Universities, Mr Memory consistently demonstrates the highest levels of customer satisfaction in supplying your computer memory solutions.

As one of the leading memory suppliers we have built our company and reputation on trust:

  • We use trusted suppliers from all around the world.

  • Our customers trust us to provide the highest quality memory at the lowest prices.

  • We trust our employees who have the knowledge, understanding and expertise to help & support you where necessary.

  • Our mrmemory.co.uk website has been "independently" checked by SafeBuy.

  • Our Payment / Checkout Form is secured by SSL & holds an independently issued Certificate.

  • Our Payment / Checkout Form is level 1 PCI DSS Compliant & holds a PCI DSS Compliance Certificate.

  • All our own computers have been subjected to independent scans to ensure that they are secure. Therefore you can trust us that your credit/debit card and address details are safe and secure.

  • Our goal is to supply all of our customers, large and small, with the correct memory for their computer(s) or digital devices.

So put your trust in Mr Memory... We look forward to supplying you.

Paul Atkinson
Head of Operations

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Customer imageCustomer Feedback History

Please feel free to access and review over 1,100 customer testimonials we have received by visiting our Customer Feedback History page.

As one of the leading memory suppliers we have built our company and reputation on trust:

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Tick imageOur knowledge regarding Specific Server Memory

At Mr Memory we realise that the Servers and Workstations you use are the backbone of your organisation. We know that you require specific memory and hard drives which are guaranteed compatible with the server, and are 100% reliable therefore ensuring maximum uptime.

Our comprehensive database contains all of the information you require for each machine such as memory speeds, capacities and the rank of module you require, therefore allowing you to make an informed decision.

Trust Mr Memory!

  • - Highest performance server memory and hard drives

  • - The right product at the right price

  • - Unparalleled customer focused service

Our comprehensive server memory product line includes all possible memory types to meet your server requirements. These are:


  • - SDRAM
  • - DDR
  • - DDR2
  • - DDR3
  • - RDRAM

  • - Unbuffered DIMMs
  • - ECC Unbuffered DIMMs
  • - ECC Registered DIMMs
  • - ECC Fully Buffered DIMMs
  • - ECC Fully Buffered DIMMs (Apple specific)
  • - Single Rank DIMMs
  • - Dual Rank DIMMs

  • - 256Mb kits
  • - 512Mb kits
  • - 1Gb kits
  • - 2Gb kits
  • - 4Gb kits
  • - 8Gb kits
  • - 16Gb kits

(NB. Prices of memory on our website is shown as single modules, not kits)

You can rest assured that ALL the memory we supply is of the highest quality, has been tested for high level performance, reliability and comes with the Mr Memory Lifetime Warranty.

The hard drives we supply are guaranteed as matched specifically to your server and are also supplied with a 3 or 5 year warranty.

We always have a server expert on hand who is ready to speak with you to help in making the right choice, and to give you that peace of mind.

Please call 01903 692 214 to talk to one of our server experts.

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Tick imageQuantity Discounts / Trade / Discounts

If you are a Business, School, University or Government Department and are looking at placing an order for a quantity of 12 pieces or more we will be able to offer a discounted price from the website.

Please contact us on 01903 692 214 or email kerry@mrmemory.co.uk with your specific requirements. We accept Purchase Orders from Schools, Universities, Government Departments and Corporate / Business Accounts. Please fax your Purchase Orders to 01903 692 212 or email kerry@mrmemory.co.uk Trade or Reseller or Dealer.

Please contact sales on 01903 692 214 or email kerry@mrmemory.co.uk and we can setup a Trade / Reseller / Dealer 30 Day Account.

We look forward to working with you.

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Padlock imageWorking to prevent credit / debit Card internet fraud

We are working with Sussex Police to PREVENT internet credit / debit card fraud.

Mr Memory's Managing Director is continuously working with Sussex Police on developing procedures to protect you the customer, as well as the online retailer.

Sussex Police

If there are any questions relating to your order, we will contact you straight away. Where there is a "clear case" of fraudulent activity, the IP (Internet Protocol) address of the specific computer used to place the order, will be forwarded to Sussex Police - www.sussex.police.uk

Internet Credit Card fraud in the UK could be as much as 500 million pounds a year. Click here for further information. Click here to read a document from Sussex Police.

Trust Mr Memory, working to prevent card fraud!

Ordering online

Ordering online with us is safe and secure! We employ a method of interaction with our visitors that does not compromise credit card information. This online system is 100% safe and secure. We encourage you to feel comfortable using your credit card to conduct business on our site. We provide a 14 day "cooling off" period, where you the consumer can change their mind at any time.

verified by visa
Mastercard securecode

About 'Verified By Visa' and 'MasterCard SecureCode'

With 'Verified by Visa' and 'Mastercard SecureCode' you can buy online with added security and peace-of mind. Your card-issuing bank will safeguard your purchase payment by asking you to confirm your identity once you have provided your card details. Visa or MasterCard and your card-issuing bank will then confirm your identity when you buy online at website's that use 'Verified By Visa' and 'MasterCard SecureCode'.

As a result, you and your bank can be sure your card is not being used fraudulently, similar to the Chip and Pin facility. The process is simple, convenient and works with your existing Visa or Mastercard.

Mr Memory provides this service for your additional security online. Most website's will have moved to this service in the future so if you do shop online it is likely that you will have to register eventually.

How your purchase is verified

You only register your card once, and then create your own password. When you then make a purchase at a participating online store, a 'Verified by Visa' or 'MasterCard SecureCode' page from your bank will appear. Simply enter your password and click "Submit" to send your details to your bank in secure encrypted format. Your identity will then be verified by your bank ensuring that your purchase is protected.

How to register

It is extremely simple to register your card(s) for 'Verified By Visa' or 'MasterCard SecureCode' by going directly to the website of your card issuing bank.

You also have the option to register your card when you reach your bank's page, during the checkout process of any participating website.

Prices

Goods are charged at the price shown on the product pages on the date you place the order and are exclusive of VAT. Prices are correct at time of publication. Errors and omissions are excepted. Orders will be processed at our published prices, otherwise, in the case of any unexpected change in price, you will be informed and asked if you wish to reconsider your order before proceeding.

Credit / debit card payments

For businesses, organisation's and individual customers, we can accept payment by all major credit and debit cards including VISA, MASTERCARD, MAESTRO & AMEX. Please note that, Amex (American Express) is subject to a 5% handling fee, and as such any orders using Amex can only be taken over the telephone. For security purposes, we will ask for your CV2 number – the last three digits of the number on your card's signature strip.

Visa logo
Mastercard logo

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Money imagePayment Options

When will my credit / debit card be charged for an order?

Mr Memory will not charge your credit / debit card until your order has been processed.

Euros / Dollars

We are also set-up to invoice and accept payments in Euros € and US Dollars $.

Credit account facilities

We offer instant 30 day credit status to all Schools, Universities, Councils, NHS Trusts, Fire / Police authorities, and all Government Departments. You can use the prices from the website, then simply send in your purchase orders to us by email fax or post. (Please remember to include a contact name, number and email address).

We can also offer 30 day credit terms to established businesses, these are available subject to status. Account customers can make payments by cheque or by 'BACs' bank transfers. Please phone on 01903 692 214 to speak with one of our dedicated account managers for further details.

Please be aware that we can offer quantity pricing and discounts.

If you have a better price give us an opportunity to quote.

"We are never beaten on price..."

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Lorry imageDelivery Options

Shipping within mainland UK

We use a variety of shipping services including Royal Mail and City Link Courier. Delivery to most UK locations with City Link is by 1pm next business day (depending on your postcode area).

Packages that communicate...

With every purchase order you place, we will send you pro-active emails when your package has left and when it's arrived. We will email you on dispatch with a direct link to City Link's website so that you can track the progress of your consignment at any time during the delivery process. The day after your order has arrived, we will also email you confirming exact 'Proof of Delivery' details; the 'time, day and date' your consignment was delivered, where your consignment was delivered to, and most importantly, who signed for it!

Shipping outside mainland UK

We use international signed for mail and courier services for shipping outside to the UK. Delivery to most European / U.S.A locations is within one week from dispatch and may take up to two weeks worldwide.

  • All our products are delivered securely in full anti-static packaging using either a high quality, padded "Jiffy" bag or a robust, cardboard box.
  • This packaging is used so we can guarantee that your order arrives safely and in perfect condition.
  • We offer two options for deliver - via Royal Mail or Courier services.
  • Full user and installation guides will be included with your order.

Royal Mail Delivery Options & Charges (see below for detailed information)

Courier Delivery Options & Charges (see below for detailed information)

Royal Mail Delivery Details

A - UK 1st Class Royal Mail (2 to 3 day service) - FREE
Your order will be shipped via Royal Mail 1st Class. Orders shipped via this service are usually delivered next day but including processing can take 3 to 4 business days (Mon to Fri).

B - UK Priority dispatch 1st Class Royal Mail (1 to 2 day service) - £0.90 Ex VAT
Your order will take priority over all other 1st Class Royal Mail (FREE) packages. Orders shipped via this service are usually delivered next day but including processing can take 1 to 2 business days (Mon to Fri).

C - UK Recorded 1st Class Royal Mail (signed for 1 to 2 day service) - £3.95 Ex VAT
Your order will be shipped via Royal Mail 1st Class Recorded Delivery. Orders shipped via this service are usually delivered next day but can take 1 to 2 business days (Mon to Fri).
This method allows your order to be traced during transit.

D - UK Special Delivery Royal Mail (next day signed for service) - £6.95 Ex VAT
Delivery will be made before 1pm on the next business day (Mon to Fri). The latest we can receive your order for this delivery option is 3pm the day before. Orders received during a weekend will be processed and shipped on the Monday and delivered before 1pm on the Tuesday. Orders received on a Public Bank Holiday will be processed and shipped the next business day (Mon to Fri).
This method allows your order to be traced during transit.

UK Special Delivery Guaranteed before 9am - £10.00 Ex VAT
(Call 01903 692 214 to use this service)
Delivery will be made before 9am on the next business day (Mon to Fri). The latest we can receive your order for this delivery option is 3am the day before. Orders received during a weekend will be processed and shipped on the Monday and delivered before 9am on the Tuesday. Orders received on a Public Bank Holiday will be processed and shipped the next business day (Mon to Fri).
This method allows your order to be traced during transit.

UK Special Saturday Delivery Guaranteed before 1pm - £12.00 Ex VAT
(Call 01903 692 214 to use this service)
Delivery will be made on Saturday before 1pm. Orders can be placed at anytime during the week for a Guaranteed Saturday Delivery. The latest we can receive your order for this delivery service is 3pm the Friday before.
This method allows your order to be traced during transit.

E - International Royal Mail by Air (6 to 10 day service) - £2.60 Ex VAT
Your order will be shipped via Royal Mail International Service. The latest we can receive your order for despatch the same day on this delivery option is 3pm.
Orders shipped via this service usually arrive within 1 week but can take 6 to 10 working days (Mon to Fri).

F - International Royal Mail by Air (4 to 6 day signed for service) - £8.00 Ex VAT
Your order will be shipped via Royal Mail International Signed for Service. The latest we can receive your order for dispatch the same day on this delivery option is 3pm.
Orders shipped via this service usually arrive within 1 week but can take 4 to 6 working days (Mon to Fri).


Courier Delivery Details

We will use one of the following companies to despatch via courier:
Citylink, Interlink, Business Post or UPS.

G - UK (next day signed for service) - £7.75 Ex VAT
Your order will be shipped via courier on a signed for service. The latest we can receive your order for same day dispatch is 3pm (Mon to Fri). Orders received during a weekend will be processed and shipped on the Monday and orders received on a Public Bank Holiday will be processed and shipped the next business day (Mon to Fri).

UK Next Day signed for Delivery before 12noon - £15.00 Ex VAT
(Call 01903 692 214 to use this service)
Your order will be shipped via courier on a signed for Next Day (Mon to Fri) service which will be delivered before 12noon. The latest we can receive your order for this delivery option is 3pm the day before (Mon to Fri). Orders received on a Public Bank Holiday will be processed and shipped the next business day (Mon to Fri).

UK Next Day signed for Delivery before 10:30am - £17.00 Ex VAT
(Call 01903 692 214 to use this service)
Your order will be shipped via courier on a signed for Next Day (Mon to Fri) service which will be delivered before 10:30am. The latest we can receive your order for this delivery option is 3pm the day before (Mon to Fri). Orders received on a Public Bank Holiday will be processed and shipped the next business day (Mon to Fri).

UK Next Day signed for Delivery before 09:00am - £30.00 Ex VAT
(Call 01903 692 214 to use this service)
Your order will be shipped via courier on a signed for Next Day (Mon to Fri) service which will be delivered before 09:00am. The latest we can receive your order for this delivery option is 3pm the day before (Mon to Fri). Orders received on a Public Bank Holiday will be processed and shipped the next business day (Mon to Fri).

UK Saturday signed for Delivery before 1pm - £30.00 Ex VAT
(Call 01903 692 214 to use this service)
Your order will be shipped via courier on a signed for Saturday service which will be delivered before 1pm. The latest we can receive your order for this delivery option is 3pm the day before. Orders received on a Public Bank Holiday will be processed and shipped the next business day.

H - International courier (2 to 5 day signed for service) - £35.00 Ex VAT
Your order will be shipped via courier on a signed for service. Orders received during a weekend will be processed and shipped on the Monday, orders received on a Public Bank Holiday will be processed and shipped the next business day (Mon to Fri). Estimated delivery time is between 2 to 5 working days however can be dependent on customs clearance.


Our delivery charges include full insurance against loss and damage in transit. All delivery times given are subject to stock levels at time of PICKING YOUR ORDER.

Please note that orders for delivery within the EU will be subject to VAT charges; if you have a valid VAT number which exempts you from this charge please ensure you state this in the relevant field when placing your order. If you fail to enter a valid VAT number or incorrectly enter your VAT number you will be charged at the current rate.

Customers ordering from outside the EU may be liable for duty and customs charges over which Mr Memory has no control.

Charges for courier deliveries do not apply for shipments to Northern Ireland. Please contact us for details.

You can contact us by phone on 01903 692 214, or by email at sales@mrmemory.co.uk.

There is always a fully trained memory specialist happy to help you resolve any problems that may occur.

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? imageTechnical Support

Installing your memory

DOWNLOAD OUR FREE MEMORY INSTALLATION GUIDE PDF (184KB)

Please do not hesitate to contact us regarding memory installation or any other technical enquiries you may have. Contact our support team by telephone on 01903 692 214 or submit your enquiry using our Support Request Form.

Equipment required to upgrade your memory:

Memory module(s), screwdriver (for removing cover only) and the computer manual to show location of memory slots.

  • Installation Process

  • 1. Make sure that you are working in a static-safe environment. Remove any plastic bags or papers from your work space.

  • 2. Turn your computer power button off, and then unplug the power cord. For notebooks remove the battery.

  • 3. Discharge residual power by pressing the power button again.

  • 4. Refer to your computer manual when removing the computer cover.

  • 5. Ground yourself by touching any of the unpainted metal surfaces on your computer's frame. (This will remove any static electricity from your body or clothing).

  • 6. Insert the module into an available expansion socket. Make sure the notches on your module are lined up with the keys in the slot, and then press down firmly. Don't be afraid that you are going to break it. It can sometimes take a fair amount of pressure to seat it correctly. (If upgrading a laptop start by aligning the module with the slot and hold the module at a 45 degree angle, now push the module into the slot and lower the module at the same time until it is almost lying flat).

  • 7. Insert your memory upgrade into an available or existing expansion slot(s). Make sure the notches on your module are lined up with the keys in the slot, and then press down firmly. Don't be afraid that you are going to break it. It can sometimes take a fair amount of pressure to seat it correctly. If upgrading a laptop start by aligning the module with the slot and hold the module at a 45 degree angle, now push the module into the slot and lower the module at the same time until it is almost lying flat. Finally gently push down to click into place. (Please be careful: Pick up the memory chip by its top or sides, DO NOT touch the silver or gold contacts at the bottom, even the slightest oil from your fingers can interfere with the connection).

  • In the unlikely event of experiencing any issues during or after installation, we ask that before contacting us, you check the following as applicable:
  • i. Ensuring that the memory you have installed is seated correctly (see point 7 above).
  • ii. Remove all the existing memory and try installing the new memory individually in each slot, this will show if the memory we supplied has incurred a fault.
  • iii. Place the existing memory in the second slot, this would show if the second slot does not work.
  • iv. Refer to the description on the original module and compare this to the product we supplied. Is it the same type of memory module?
  • v. Check if you have the latest BIOS setting for your Notebook / Desktop, (this can be found on the manufacturers website under the support and downloads section - it is free and only takes a couple of minutes to upload to your machine). On occasions The BIOS settings prevent the motherboard from reading the maximum memory available per slot.

We are here between 08:45 and 17:30 Monday to Friday to assist further if required.

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Arrow imageReturns and refunds

If after receiving, or, installing your memory you encounter any problems or error messages please contact us straight away so one of our specialists will be able to assist you.

In no circumstances should you personally arrange for a PC engineer to assist you before contacting us as we will not be held liable for any costs incurred.

You can contact us by phone on 01903 692 214 or please submit your enquiry using our Support Request Form.

There is always a fully trained memory specialist happy to help you resolve any problems that may occur.

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Tick imageI actually made a mistake and ordered the incorrect memory, can I return it?

Do not worry! You can rest assured we will exchange or refund the memory - we also provide a Freepost method to send the memory back.

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Tick imageWhat type of memory do I need?

To find the type of memory you need simply select your computer make and model from our list.

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Tick imageMy computer is not on your list?

If you cannot find your model number on our list do not worry, we can definitely supply the memory! Please call or email our sales team on 01903 692 214 or sales@mrmemory.co.uk and we will be happy to help.

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Tick imageWhy is RAM from Mr Memory less expensive than from my system manufacturer?

This is because Mr Memory are able to supply memory modules made by various different manufacturers. We do this so we can always be certain of offering the modules at the lowest prices. All memory we supply meets or exceeds the highest industry standards and undergoes testing to ensure it will perform as required, this is why we offer a FULL Lifetime Warranty on all memory supplied.
Installing memory supplied by Mr Memory will not void your system warranty.

Because of this we are so confident of supplying the lowest price and that is why we encourage you to compare prices before buying.

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Tick imageWill adding more RAM make my Internet browsing faster?

Yes, memory will have a positive affect on the speed of your browser, however please note that Internet browsing speed depends on a number of factors, another important factor is your connection speed.
You will notice most improvement from additional RAM if you are viewing or working with large files (photos, digital audio & video), or if you switch often between your browser and other applications.

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Tick imageI live in the Sussex area. Can I pick up my order at Mr Memory?

We're sorry, but we do not currently allow customers to pick up their orders at our site. For logistical reasons, visits to Mr Memory are strictly limited. You will need to choose one of our standard shipping options.

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Tick imageCan installing memory in my computer invalidate the computer warranty?

In short the answer is NO!
There is an act of court called the Magnuson-Moss act (passed in 1975) which protects your right to use third party memory (supplied by MrMemory.co.uk) in an appropriate computing system without voiding system or service warranties offered by the manufacturer.

This act states that tie-in sales provisions are NOT allowed in consumer warranties. Manufacturers cannot require consumers to purchase items or services in order to keep their warranty valid.

Essentially, the act states that a warrantor cannot require the consumer of their product (a computer) to buy an additional product or service (OEM memory) to be used with the original product in order to maintain the original product warranty.

In other words, you cannot be required to add the computer manufacturer's memory to maintain the warranty on the system. Also, the computer manufacturer cannot state that the system warranty is void if other "brands" of peripherals are used.

For example:
If you purchased ABC computer but chose to use XYZ brand memory, ABC Company cannot void the warranty or refuse to provide service on your ABC computer.

Please click here to understand the Magnuson-Moss Warranty act

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? imageWhat does computer memory do?

The term "memory" to refers to RAM (Random Access Memory). A computer uses RAM to hold temporary instructions and data needed to complete tasks. This enables the computer's CPU (Central Processing Unit) to access instructions and data stored in memory very quickly.

This starts when you enter a command from your keyboard or mouse. The CPU interprets the command and instructs the hard drive to load the command or program into memory. When loaded into memory, the CPU is able to access it much more quickly than if it had to retrieve it from the hard drive.

This process allows you to keep all the files you need handy and avoid searching in several places every time you need them, and you can therefore get work done more quickly with less time spent waiting for the computer to perform tasks.

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? imageWhy will more memory help me?

Adding more memory to a computer system will increase the performance, (usually quite dramatically).

When there isn't enough room in memory for all the information the CPU needs it has to get some memory from somewhere, so the computer sets up what's known as a virtual memory file. This file is located in your hard drive and uses a percentage of the drive to simulate additional RAM, (also known as memory cache). This process slows the system down.

With a memory upgrade, applications respond more quickly, Web pages load faster, and you can have more programs running simultaneously. In short, additional memory can make your computer higher performing, faster, more reliable, highly productive and far more enjoyable to use.

Server performance has a huge impact on the performance of a network: if a server is performing poorly, everyone on the network "feels the pain". So, while a memory upgrade on an individual PC makes a big difference only for the person who uses it, a memory upgrade in a server has far-reaching effects and benefits everyone who accesses the server.

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? imageIs it easy to upgrade computer memory?

YES, upgrading memory in any computer is a very quick and simple process. You do not require special tools (except for a screwdriver) or expertise, once the memory is installed - the computer will automatically recognise and use the extra memory. We supply an installation guide with each memory upgrade.

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? imageWhere and how do I update my BIOS?

If you have been advised to update your BIOS to get the memory to work you can do this free of charge by visiting the website of the manufacturer of your computer or motherboard.

Doing this is simple, select the range and model number of your computer and select the relevant BIOS update, this will then be done automatically and will only take a couple of minutes. You will see we have provided links to the top 10 most common manufacturers, if your is not listed simply visit the website, select the Support & Downloads section and enter your model number.

Please note: We recommend you have your computer connected to the mains to prevent it from running out of power during the upload. We also advise that you always refer to your user manual or the manufacturers advice before carrying out the upgrade.

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? imageDo I have to install memory in matched pairs (the same size)?

Depending on your computer you may not have to install memory modules in matched pairs*.

In general it is perfectly acceptable to mix different capacity memory modules together, however there are models which require installation in pairs. So a 512MB module can be added to the 256MB module to give 768MB in total. (*One exception would be for dual-channel systems, if your computer supports Dual-Channel, it is recommended (for best performance) to install memory in matched pairs).

Please check if your system requires installation in pairs before making your purchase.

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? imageWhat is "RAM"?

RAM is an abbreviation for Random Access Memory.

A computer uses RAM to hold temporary instructions and data needed to complete tasks. This enables the computer's CPU (Central Processing Unit) to access instructions and data stored in memory very quickly.

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? imageWhat is "Dual Channel"?

Dual-Channel is technology which doubles the data throughput from the memory to the CPU, for the Dual-Channel mode to function, memory modules must be installed in matched pairs e.g. 2 x 512MB or 2 x 1GB etc. If memory is installed in unmatched pairs e.g. 512MB plus 1GB - then the Dual-Channel mode is simply disabled, however the computer will still function correctly if the memory is not matched.

Dual-Channel is simply an additional function however is only available on some computers. If your computer accepts and utilises Dual Channel memory we ALWAYS recommend you use this as in doing so you will gain around 15% to 20% in performance of the memory.

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? imageWhat is "ECC"?

ECC stands for "Error Correction Codes" and is a method used to detect and correct errors introduced during storage or transmission of data. Certain kinds of RAM chips inside a computer implement this technique to correct data errors and are known as ECC Memory.

ECC Memory chips are predominantly used in servers.

There are Other Types of ECC memory which include Registered and Fully Buffered modules. Some systems do not support registered memory, others require registered memory, and many more give you the option to use registered or unregistered memory.

The use of registered memory is recommended for server-class systems. It is not useful on gaming systems. Please check which memory your system requires as 99% of household PC's (Personal Computers) DO NOT require ECC memory.

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? imageThe part number on the new module is different from the one on my original module?

If your new module has a different part number than the module you ordered online, you can rest assured you have the right part. The module(s) we supply are guaranteed compatible with any given system (as stated). The actual part number and manufacturers part number can appear on the module itself. These two cross-referenced part numbers refer to the same module.

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? imageDoes it matter which slots I put the memory upgrade modules into?

On older systems, DDR and earlier, you generally will get the best performance if you put the largest module (in megabytes / Mb) in the lowest-numbered slot. For example, if your computer comes with 256MB of removable memory and you want to add a 512MB module, it would be best to put the 512MB module into slot 0 and the 256MB module into slot 1.
If you have a newer system which dual-channel system (some DDR systems and all DDR2 systems), the slot selection DOES matter. First of all, you are likely installing memory in pairs to take advantage of the increased performance from dual-channel. Both modules must be placed into the SAME bank on the motherboard.
How do you know which slots are in the same bank? Well, it varies from board to board, usually the slots for each channel are numbered or coloured the same. If you're not able to determine which slots belong to which bank/channel, check your computer's user manual.

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? image Do I have to remove the old memory when upgrading?

In most cases no, you can simply add the new module(s) to your computer without removing the old module(s).
If however you have all the slots filled and you wish to upgrade then you will have to remove at least 1 module. For example, if your computer has two slots, came with 2 x 512MB modules, and has a maximum capacity of 2GB, you'll need to remove the 512MB modules and add two 1GB modules to maximize your memory.
Keep in mind that some computers, especially those using the dual-channel function you'll need to make sure that modules are the same size and speed and are installed in pairs.

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? imageThe memory module I received from Mr Memory is a faster speed than I ordered.

On rare occasions we will ship you a faster speed memory module than what you ordered, at no additional charge; this is due to current stock levels.
Rest assured that this memory will function at or above the level of the memory you originally ordered.
Normally faster memory will "clock down" (reduce its speed) on its own to match the speed that your computer requires. Please note not all systems will allow this, and unlike other memory suppliers we know the difference. If Mr Memory supplies an alternate speed for a specific computer it will be guaranteed to work.

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? imageTroubleshooting Advice

Roger from Manchester asked: I cannot find the memory slot in my computer, what shall I do?
Please refer to your computers manual, if you do not have it to hand you will be able to view it free of charge by visiting the Manufacturers website.

Stuart from Bishop Stortford asked: I am upgrading a notebook and there is only 1 slot on the back, your website says there are 2 - is this correct?
The location of the memory slots in notebooks differs from machine to machine - there are 3 possible places they will be found:
1) Both underneath the base sitting side by side.
2) Both underneath the base sitting one on top of the other. You need to remove the top one to access the empty slot.
3) One under the base and one under the keyboard. To access the slot under the keyboard is actually very easy, the best way on
how to do this is by looking at your computers manual, if you do not have it to hand you will be able to view it free of charge by visiting the Manufacturers website.

Tony from Hull asked: The memory you have supplied is different from the memory I already have installed in my computer, will that cause a problem?
In a word - No, the speed of the memory we have supplied may differ slightly from the memory you have already installed in your computer, this is not a problem it is simply because we are supplying the most beneficial speed and the guaranteed matched part available for your computer. If you still believe there is an issue please contact our support department by using the Support Request Form.

Derek from Tooting asked: The memory I received does not fit in the machine, is it the correct type?
Look at the description on the original module and compare this to the piece we supplied, to see if it differs. If it is the same then there may be an issue with how you are installing it - please refer to the installation guide we supplied. If however the description is different and it will not fit at all then please contact our support department by using the Support Request Form.

Sally from Lytham St. Annes asked: After putting in the memory I bought from you the computer does not switch on, am I doing something wrong or is there a problem?
Ensure that the memory you have installed is seated correctly and pushed in firmly, please refer to the installation guide we supplied.
If this does not resolve the issue then remove all the existing memory and try installing the new memory module (or one of them if bought multiple) in the first slot, now try turning on the computer. If the computer starts then you know that module is working, now try the same operation with each of the memory modules supplied. This will show which, if any, of the memory module(s) we supplied have incurred a fault. If you find all memory modules work on their own in the first slot but do not work when together with other memory
modules please contact our support department by using the Support Request Form.

Rob from Southampton asked: The memory I have purchased works alone, but not with the original memory that came with the machine, do I need to do anything different?
Look at the description on the original module and compare this to the piece we supplied, to see if it differs. If it is the same then there may be an issue with how you are installing it - please refer to the installation guide we supplied. If however the description is different then it may be due to the density of the memory module, please contact our support department by using the Support Request Form.

Carl from Dudley asked: Since installing the memory you supplied my computer turns on, starts to boot, but then either freezes or starts the boot process again, what is the problem?
Ensure that the memory you have installed is seated correctly and pushed in firmly, please refer to the installation guide we supplied. If this does not resolve the issue then remove all the existing memory and try installing the new memory module (or one of them if bought multiple) in the first slot, now try turning on the computer. If the computer starts then you know that module is working, now try the same operation with each of the memory modules supplied. This will show which, if any, of the memory module(s) we supplied have incurred a fault. If you find all memory modules work on their own in the first slot but do not work when together with other memory modules please contact our support department by using the Support Request Form.

Tom from Harrogate asked: My Computer will turn on but not long after loading up it will crash and display a blue screen.
This could be because the memory is not installed correctly. Ensure that the memory you have installed is seated correctly and pushed in firmly, and try turning on the computer again. If this does not resolve the problem it could be that the memory has incurred a fault, please contact our support department by using the Support Request Form.

Phillip from Burnham-on-Sea asked: The machine is not showing the new memory I have installed.
Ensure that the memory you have installed is seated correctly and pushed in firmly, and try turning on the computer again. If this does not resolve the problem it could be that the memory has incurred a fault, please contact our
support department by using the Support Request Form.

Kerry from Kelso asked: After installing the memory some of my programs will randomly crash and close, I.E. Internet Explorer, Firefox, Microsoft Outlook, why is this happening?
Look at the description on the original module and compare this to the piece we supplied, to see if it differs. If it is the same then unfortunately this sounds like one of the memory module(s) has incurred a fault and you will need a replacement module; if it is different we will need to supply the matching part. Please contact our support department by using the Support Request Form and we will arrange for a replacement.

Mike from Widnes asked: I have recently upgraded my machine to Windows 7, and the new memory I have purchased no longer works, is it faulty?
No, the memory is not faulty. This has been found to be a common issue with windows, we would resolve this by supplying memory with a different chipset. Please contact our support department by using the Support Request Form.

Tori from London Bridge asked: After installing the memory in my Mac I have been experiencing Kernel Panics, will this cause a problem for my Mac.
Receiving Kernel Panics can happen on Mac's, in Fact Apple themselves state it may be normal to expect between 2 and 6 kernel panics a day. If you are experiencing more than this please contact our support department by using the Support Request Form and we will be happy to resolve the issue.

Andi from Chelmsford asked: I cannot get the memory to work in My Apple Mac Pro, is there a special way to install the memory?
Yes, depending on the number of modules you are trying to install there is a specific pattern to follow. Please view the specific Mac Pro Installation Guide which you can find on the Apple website, if you cannot find this please contact us by using the Support Request Form and we will be happy to provide it for you.

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