Laptop Memory

Need a Ram upgrade for your laptop? The solution is right here. From SDRAM to DDR4 we have them all. Select your Laptop Manufacturer to improve your Notebook today.

Desktop Memory

Is your PC running slowly? Find out all there is to know about your Desktop Memory. Choose your Manufacturer from below and we will send you a ram upgrade for your specific machine.

Server Memory

Discover the perfect Ram for your Server. Create a unbeatable Server solution to ensure that your workforce are achieving 100% performance.

Why Shop with Offtek?

Offtek have been supplying laptop memory, computer memory and memory for all devices online since 1997 and have quickly established ourselves as one of the UK's premier memory distributors as well as one of Europe's largest online memory suppliers.

We offer fast, free UK delivery including a 60 day money back guarantee and ensure your order is 100% compatible.

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Private Sector Credit Accounts

Offtek are happy to offer 30 day credit accounts to all corporate and commercial businesses.

Approval progress takes less than 24 hours, subject to receipt of completed application form and financial checks.

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Public Sector Credit Accounts

Offtek offer instant 30 day credit accounts for all public sector organisations including:

The NHS, Councils, Education and Registered Charities

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What are the different Memory Variations

There are various different types of memory which fall into different categories. You will need to make sure you select the correct matched memory for your system which you can do by searching for the make and model using the Offtek online configurator. The various memory types are:



ECC Unbuffered DIMM

ECC Registered DIMM

ECC Fully Buffered DIMM

ECC Load Reduced

ECC Unbuffered SODIMM
*These variations are broken down further into different sub categories which include, Genre, Build (No of Pins), Capacity, Speed, Density and Dimensions which we are not listing on this page but can be found explained within the FAQ section on our website.

NON-ECC Memory – Who uses it:

 Non-ECC DIMM & SODIMM memory is the type that the vast majority of PCs and laptops use, this includes Personal Computers for home use and low end office Workstations. For the majority of systems being upgraded, you will never need to use ECC Memory.

What ECC Memory stands for:

ECC stands for Error-Correcting Code. ECC Unbuffered, ECC Registered, ECC Fully Buffered and ECC Load Reduced DIMMs are types of Ram Memory with a difference, Ram memory with ECC are able to identify and correct the most commonly occurring types of soft memory errors.

ECC Memory – Who uses it:

Most of us won’t have any need to come into contact with ECC RAM. It is used in Servers and high end Workstations by industries where they cannot allow data corruption to occur within their systems, e.g. the Government, Financial or Scientific sectors.

Potential errors caused by corrupted data are routinely located, checked and corrected by sending all data via the computer’s memory bank register. This task takes extra clock cycle(s) (compared with Non-ECC memory) for the ECC memory to perform, but it is worth it, as hugely damaging mistakes for the types of companies that use them are eradicated.

Can I mix ECC Unbuffered, ECC Registered, ECC Fully Buffered, ECC Load Reduced and Non-ECC DIMMs / SODIMM’s in my PC?

In short, no, you can’t.

As a simple rule, each of these memory types are designed to work on their own as they are created to perform different functions.

There are some higher end Workstations and low end Servers where you can mix Non-ECC and ECC Unbuffered DIMMs, however certain performance aspects are affected (check our online configurator to see if this relates to your model if it does consult your user manual for further explanation or contact us).

The following is a guide as to when you are able to use Non-ECC and ECC Unbuffered DIMMs individually or in conjunction with one another in your system:

  1. Error Correcting not needed:  - If you do not require the ‘Error Correcting’ function of the modules to operate as they should in your system, then you may be able to use Non-ECC alongside ECC Unbuffered DIMMs. The system will simply ignore the ‘Error Correcting’ aspect of the ECC Unbuffered DIMMs and it will act as if the memory didn’t have it at all.
  2. Parity Checking not needed: - If you do not require the ‘Parity Checking’ function of the modules to operate as they should in your system, then you may be able to use ECC Unbuffered instead of ECC Registered DIMMs. The system will understand that the memory installed does not have the ‘Parity Checking’ aspect, however, you will still utilise the ‘Error Correcting’ aspect.

On some systems, you may be required to disable the ‘Parity Checking’ in the BIOS. 

ECC Registered, ECC Fully Buffered and ECC Load Reduced DIMMs will only work on their own, if you install any of these modules together your system will not work or you will experience a wide range of performance issues.

It is important to select the correct Memory / Ram for your system - BEFORE carrying out an upgrade!

We understand that on occasion RAM compatibility issues (especially in older models) can lead people to try and use ECC Unbuffered, ECC Registered, ECC Fully Buffered and potentially ECC Load Reduced memory modules in a non-parity checking machine. If you are in the position where you would like to try this please check the information above, use our online configurator and/or contact us for assistance first.
Although we have hundreds of thousands of upgrade options on our website there are new models being released daily, also there are older models which have DIMM requirements that are very specific. If you cannot find your model on our configurator then please contact us as we are sure we will be able to help you.

The History of Fujitsu-Siemens Computers

The company we know today as Fujitsu Siemens began life in 1999 when the German company Siemens started a 50-50 joint venture with the Japanese giant Fujitsu Limited. This partnership lasted 10 years until in 2009 the German half of the enterprise was bought out by the Japanese, who then renamed the company Fujitsu Technology Solutions.

Green IT
Fujitsu-Siemens was focussed particularly on producing ecologically sound computers and the enterprise was seen as a leader in ‘Green IT’. Despite sponsoring the McLaren Mercedes Formula 1 team from 1999 to 2000 (a sport not exactly known for a low carbon footprint), the company has a longstanding record of leadership in the field.

As of 2012, the company was 3rd out a total 21 major manufacturers on the ‘Cool IT’ leaderboard, according to Greenpeace.

Long History
The Fujitsu brand certainly has some longevity, as it is the 3rd oldest IT company in the world, beaten only by IBM and Hewlett Packard. Founded on June 20th, 1935, under its original name ‘Fuji Telecommunications Equipment Manufacturing’. The company even survived the chaos that ensued after the Allied occupation of Japan after WWII. Their association with the German company Siemens also goes back to that time.

to Strength
Fujitsu Ltd is the fourth biggest IT services provider in the world and is listed as a Global 500 company. The main thrust of the business is computing products, but it also has several subsidiaries that offer a diverse range of services in enterprise computing, telecommunications, air conditioning and microelectronics. The company currently employs in excess of 159,000 people and is listed on Tokyo Stock Exchange, selling products in over 100 countries. 

Today the brand that is Fujitsu manufactures a range of and notebook PCs, desktops, servers, storage and datacentre products. The company has a major presence in the major European, Middle Eastern and African markets and continues to be one of the world’s largest players in the world of computers.

Mergers and partnerships have been a common thread throughout the long history of Fujitsu and things are no different today. In the last few years, the enterprise has collaborated with GLOVIA International and VMware. As serial innovators, Fujitsu will most probably be involved in consumer electronics for the next 80 years and beyond. Cloud technologies, visualisation products, and multi-vendor network automation are just a few of the fields the company is working in today.

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