Home >
Computer Memory >
DDR4 PC4-21300 2666MHz 288-pin RDIMM ECC Registered >
16GB

Product Code: MR23225-SG016

Please enable JavaScript in your web browser

For full functionality the Mr Memory website requires JavaScript to be enabled

How do I enable JavaScript?

60,416 reviews

16GB DDR4 PC4-21300 2666MHz 288-pin RDIMM ECC Registered

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

Product Summary

£36.25

BUY NOW

Benefits of Upgrading Delivery Options

Product:Memory / RAM

Size:

Kit:Single Module

Type:DDR4 DIMM

Class:Server / Enterprise

Speed:PC4-21300 2666MHz

ECC:ECC Registered

Pins:288-pin

Stock:

Original Part Codes:

• M393A2K43CB2‑CTD (Samsung)
• MTA36ASF2G72PZ‑2G6 (Micron)
• HMA82GR7AFR4N‑VK (SK Hynix)
• KSM26ES8/16HC (Kingston)

Please contact us by telephone on 01903 692 214 or use our Enquiry Form for a quotation on any of the above part codes. One of our Server Wizards is ready to help you!

Upgrade your server or workstation with brand new DDR4 2666MHz ECC Registered memory - the quickest, easiest way to maximise performance and increase reliability! 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.

Orders placed Monday to Friday after 16:30 (UK time) or on weekends/bank holidays will be processed the next business day.
(subject to stock, order verification and chosen delivery option)

Installation Guides Returns & Refunds Help Me Choose

Rated Excellent

60,416 Reviews

Collecting Reviews Since 2014

FREE
Warranty

SECURE
Payment

WORLDWIDE
Shipping

UNLIMITED
Support

31 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

Have been using Mr memory for years and…

have been using Mr memory for years and never had any issues!

Egis Paulikas - Thursday 19th June 2025

Verified order

Perfect transaction

Testing app showed I had two slots available for another 32 mb, in effect doubling RAM. Order came next day and installation straightforward, even for an 86-year old. Grandson's favourite game now performs as it should.

Peter Relf - Wednesday 18th June 2025

Verified order

Show reply

Fast delivery and works perfectly

Fast delivery and works perfectly, never had a bad order from this place and will continue to use them each and every time I'm ready to upgrade our computers. Many thanks and keep up the great work

Tony Gillett - Tuesday 17th June 2025

Verified order

Show reply

Good thing I remembered Mr Memory

Made the mistake of buying 6000Mhz DDR5 for my Z890 build. Turns out there were no 8400Mhz DDR5 on the UK Amazon store at the time but, Mr Memory had stock. Will be buying again soon...

Barry Hoyte - Sunday 15th June 2025

Verified order

Show reply

Great buying experience.

I ordered extra memory for my 2007 iMac on the 12th of June and it arrived with me in Northern Ireland less than 24hrs later.
Selecting the memory I needed on the Website was so easy and an installation guide was emailed to me with my invoice.
The additional memory is now installed on my Mac its peformance is now so much faster.
I was also kept up to date as to when the memory would arrive.
an overall excellent buying experience.

Tony Walker - Friday 13th June 2025

Show reply

Bang on in every way with good tech…

Bang on in every way with good tech info to inform choice

Richard paskin - Thursday 12th June 2025

Verified order

Show reply

5 Star Company - 5 Star Service

I use this company on a regular basis to assist with my clients requirements. Their service is beyond excellent and l go no where else for computer memory. Prompt and very professional, why go anywhere else.

JOHN BRANDOM - Wednesday 4th June 2025

Verified order

Show reply

Fantastic website and service

Fantastic website, so pleased I found this. So easy to install new memory into my Apple iMac and now it's so fast. Delivery was super quick also.

richard Siggers - Tuesday 3rd June 2025

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
31 years in business
UK company, based in large modern business park for over 16 years
Memory sent in Anti-Static packaging for safe transit
RAM extensively tested prior to shipment
Highest quality brand new 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 2027.

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 COP29
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 HD videos

WATCH 30+ 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 Servers. For guaranteed compatibility, please choose your Model
System Warranty:	This upgrade will not invalidate your system warranty
Speed:	2666MT/s (PC4-21300)
Technology:	DDR4 SDRAM
Pins:	288-pin, Gold Connectors
Form Factor:	RDIMM (Registered Dual Inline Memory Module)
Data Integrity:	ECC Registered
Ranking:	1R, 2R, 4R
Voltage:	Low - 1.2V
CAS Latency:	You will receive memory with the correct CAS Latency for your model
Warranty:	1 Year Manufacturers Warranty

16GB DDR4 PC4-21300 2666MHz 288-pin RDIMM ECC Registered

Product Specifications

Installation & Support

Installation is Easy with Fast & Professional Support

Installation

Support

International Delivery, Returns & Refunds

International Delivery

International Returns & Refunds

ServerCare Memory Solutions

Mr Memory cares about your IT Infrastructure

ServerCare Programme

Trust Mr Memory to provide you with:

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

Have been using Mr memory for years and…

Perfect transaction

Fast delivery and works perfectly

Good thing I remembered Mr Memory

Great buying experience.

Bang on in every way with good tech…

5 Star Company - 5 Star Service

Fantastic website and service

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 HD videos

Join FREE for exclusive discounts and news

CONNECT

POPULAR

KNOWLEDGE

LEGAL