Product Code: MR21055-SG004

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58,936 reviews

4GB DDR3 PC3-8500 1066MHz 240-pin DIMM

For guaranteed compatibility, please choose your Model, use our ScanMyPC app, or Contact a Memory Specialist for assistance.

Product Summary

$15.10

$17.80Save $2.71 Today

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Benefits of Upgrading Delivery Options

Product:Memory / RAM

Size:

Kit:Single Module

Type:DDR3 DIMM

Class:Consumer

Speed:PC3-8500 1066MHz

ECC:Non-ECC

Pins:240-pin

Stock:

Upgrade your computer with DDR3 1066MHz memory - the quickest, easiest way to boost performance and speed! Adding extra memory is one of the most cost-effective ways to make your operating system and applications run faster and smoother for peak performance. Hi, Speed!

All memory is brand new, comes with a Full Lifetime Warranty and is packaged and protected by bespoke Mr Memory Anti-Static shield bags or recyclable plastic packets placed inside a Jiffy bag or cardboard box.

Installation Guides Returns & Refunds Help Me Choose

Orders placed Monday to Friday after 17:00 (UK time) or on weekends/bank holidays will be processed the next business day.
(subject to stock, order verification and chosen delivery option)

Rated Excellent

58,936 Reviews

TRUSTED
Lifetime Warranty

SECURE
Payment

WORLDWIDE
Shipping

UNLIMITED
Support

30 YEARS
and Counting

Benefits of Upgrading your Computer Memory

Upgrading is Easy - Go to the Maximum - Renew your Device

If you can change the batteries in your remote control, you can upgrade your memory too! It really is that simple!

The files and programmes on your device are stored on the Hard Drive or Solid State Drive, not the RAM - so you will not lose anything when replacing modules.

Speed & Peak Performance

Improve start-up time and optimise the speed of your operating system
Maximise all-round efficiency & multitask with ease
Speed up your games and apps, including video and photo editing software
Peak performance for home schooling, streamers, video callers, gamers & online shoppers
Improve the performance of your favourite video streaming platforms

Simple, Quick & Easy

Easy as 1, 2, 3 (Order, Deliver, Install)
Upgrading your computers memory is simple with our easy to follow installation guides & videos
Free support provided by our friendly specialists should you need help
Easy to install - Upgrade your computer in less than 5 minutes
Working from home? Ensure your computer is up to the task with a simple Memory upgrade

Big Savings

Don't waste money on a new machine when you can renew & extend what you have!
Save money on unnecessary installation costs by upgrading yourself
Increasing your computers memory will give you the biggest performance increase for your money
Save hours of lost time waiting for your computer to load
Maximise the value of your computer

Reduce your impact on the Environment

Join 500,000+ Mr Memory customers who saved their computer from a trip to the recycling centre
Renewing your device instead of replacing it reduces e-waste and greenhouse emissions
Help electronics become a more sustainable part of our lives by renewing them
By using your electronic devices for as long as possible, you are saving the planet’s resources
Return your old Memory to us and we will ensure it is responsibly recycled

Working from Home & Hybrid Working

If you work from home or are thinking of doing so in the future you need to have the right tools available to do your job as efficiently as possible. Whether you use your own computer or a company owned device, do not be slowed down by insufficient memory or storage. Upgrading the memory and/or SSD is a simple way to save time when working from home.

Increase home working efficiency and performance
Create a stress free and healthier environment with less distractions
Minimise the impact of a slow connection, and improve the responsiveness of video calls
Easily upgrade your computer at home, and claim on company expenses
Working from home has been shown to improve creativity and give a better home life/work balance
Save time and money on commuting, and benefit from flexible scheduling

Trusted & Reliable Customer Reviews

Medion Compatible / Memory
Upgrades Purchased

Possibly the easiest PC upgrade I have…

Possibly the easiest PC upgrade I have ever done. Really good lookup tool to find the right stick of memory, upgrade took a few minutes with no problems encountered.

Charles G - Thursday 25th April 2024

Verified order

Acer Compatible / Memory
Upgrades Purchased

Great service

Edward Petrone - Wednesday 24th April 2024

Verified order

Show reply

Alienware Compatible / Memory
Upgrades Purchased

Fast service - great communication

Easily searchable website to find what was required
Fair pricing
Fast service
Good communication

Duncan - Wednesday 24th April 2024

Verified order

Show reply

Lenovo Compatible / Memory
Upgrades Purchased

Good information on my PC showing the…

Good information on my PC showing the options available to upgrade memory.

Fast delivery.

Michael - Wednesday 24th April 2024

Verified order

Show reply

HP Compatible / Memory / SSD
Upgrades Purchased

Best computer upgrade people I have found.

I found the site on google and am so glad I did they were so good at helping me choose what I needed to upgrade my computer .
They helped me after wards with fitting the SSD with an instant reply to my query. I cannot rate them high enough no 6 x . I shall be using the again. Thank you Mr Memory.

Linda - Tuesday 23rd April 2024

Verified order

Show reply

Acer Compatible / Memory
Upgrades Purchased

My new RAM worked straight away!

As soon as I received my new RAM modules, I removed the old ones and inserted them.
I plugged my computer back in, and the miracle happened!
I'd already tried 2 different types of RAM, but none of them would work.
I would like to thank Mr Memory for the quality of their service and components.

Michel G. Pensis - Sunday 21st April 2024

Verified order

Show reply

Dell Compatible / Memory
Upgrades Purchased

Memory arrived as promised well…

Memory arrived as promised well protected.
Installed and operated as expected.
Used Mr Memory many times no problems.

Ken - Sunday 21st April 2024

Verified order

Show reply

MSI (Micro-Star) Compatible / Memory
Upgrades Purchased

Great Seller.

The memory modules worked without issue. Delivery was very fast via DHL. Very good service.

Mark - Friday 19th April 2024

Verified order

Show reply

4.9 out of 5 MORE REVIEWS

Trust the Mr Memory Brand

Feel Safe, Feel Secure & Feel Appreciated

We help people to feel safe, happy and secure. You can trust the Mr Memory brand - we will protect your data, save you money and improve the performance of your valued devices, whilst being eco-responsible.

Our specialists provide free support to anyone who needs it - at any stage of the order process. Our communication is fast and our guidance is as technical or as basic as you need it to be.

Fully informed at every stage of the order
100% Safe & Secure website
Fast dispatch - 98% of orders dispatched same day, using eco-friendly packaging
30 years in business
UK company, based in large modern business park for over 15 years
Memory sent in Anti-Static packaging for safe transit
RAM extensively tested prior to shipment
Highest quality products from the best brands in the world
Dedicated & highly trained experts with an average of 10 years experience
30-day credit available to the Public / Private Sector
250,000+ businesses use Mr Memory for their Memory/RAM & SSD upgrades
Our customers trust us with all their Memory/RAM & SSD upgrade requirements
Free environmentally friendly recycling of your old product
We are eco-responsible in everything we do and encourage you to be the same
Follow our cycle of Reduce → Reuse → Recycle
We can communicate via email in multiple languages
Over 150,000 registered online customers
We are compliant with the latest privacy regulations including the UK and EU GDPR
All staff are GDPR trained and certified and we have a dedicated Privacy Officer

Mr Memory are now collecting reviews on Google!

Since November 2021 we are now collecting reviews from our customers on Google
We are expanding our review platforms and we are very excited to see our reviews grow
Each review is read and responded to by one of the team as we really appreciate each one received
Please share your experience with the Google community - review us on Google

Working Towards a Sustainable Future

Mr Memory is tackling climate change as a team with an aim to being carbon neutral by 2025.

Our employees are encouraged to walk, cycle or car share
We encourage our employees to stay healthy, eat more sustainable food and buy locally
We always try to purchase from UK based companies where possible
We hold regular staff meetings where our employees opinions on climate change are heard
We supply appropriate uniform to reduce heating and air-con use
We have waste reduction procedures in place - all of our packaging can be recycled
Our refuse bags are bio-degradable
Our cleaning equipment and products are all eco-friendly
Our printing is limited to essential customer paperwork only
We are in the process of upgrading all of our lighting to energy efficient LED bulbs
When not in use all electrical devices are turned off and we always purchase energy efficient devices
Our energy supplier is working towards using 100% renewable electricity and is a Principal Partner of COP26
All of our suppliers use recyclable packaging, which we reuse where possible
We are constantly reviewing our Sustainability Statement
Our Sustainability Specialist, Zoe Killick, oversees our plans to becoming carbon neutral

Play our educational 50+ HD videos

WATCH 50+ VIDEOS

Module:	x1 (single module only)
Memory Brand:	We supply the best brands in the world so you will only receive brand new premium memory of the highest quality
Compatibility:	Commonly installed in Desktops & Servers. For guaranteed compatibility, please choose your Model
Product Warranty:	Full Lifetime Warranty
System Warranty:	This upgrade will not invalidate your system warranty
Speed:	1066MHz (PC3-8500)
Technology:	DDR3 SDRAM
Pins:	240-pin, Gold Connectors
Form Factor:	DIMM (Dual Inline Memory Module)
Module Dimensions:	133.35mm x 30mm (LxH)
Data Integrity:	Non-ECC
Ranking:	1R, 2R, 4R
Voltage:	1.35V - 1.5V
CAS Latency:	You will receive memory with the correct CAS Latency for your model

4GB DDR3 PC3-8500 1066MHz 240-pin DIMM

Product Specifications

Installation & Support

Installation is Easy with Fast & Professional Support

Installation

Support

International Delivery, Returns & Refunds

International Delivery

International Returns & Refunds

Benefits of Upgrading your Computer Memory

Upgrading is Easy - Go to the Maximum - Renew your Device

Speed & Peak Performance

Simple, Quick & Easy

Big Savings

Reduce your impact on the Environment

Working from Home & Hybrid Working

Trusted & Reliable Customer Reviews

Ranked No. 1 in 1 Trustpilot Category:

Possibly the easiest PC upgrade I have…

Great service

Fast service - great communication

Good information on my PC showing the…

Best computer upgrade people I have found.

My new RAM worked straight away!

Memory arrived as promised well…

Great Seller.

Trust the Mr Memory Brand

Feel Safe, Feel Secure & Feel Appreciated

Mr Memory are now collecting reviews on Google!

Working Towards a Sustainable Future

We are eco‑responsible

Play our educational 50+ HD videos

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