Server memory

Server memory is the RAM that goes into rack servers, tower servers and workstations, usually as ECC modules in RDIMM or other server-specific formats. Our range in this category is small at the moment, with ASRock the only brand listed, so it suits buyers looking for a specific part rather than a broad comparison.

How to choose server memory

Memory generation. DDR4 and DDR5 modules are not interchangeable, because the slots are physically different and the server platform supports only one of them. Check the processor and motherboard specifications before ordering anything.

Module type. Servers commonly use registered modules (RDIMM) or load-reduced modules (LRDIMM), and many boards will not accept unbuffered desktop modules in the same system. Your server manual states which types it takes, and mixing types in one machine is generally not supported.

ECC support. ECC memory detects and corrects single-bit errors, which matters for databases, virtualisation hosts and file servers that run for months without a restart. Most server platforms expect ECC modules, so treat it as a requirement rather than an extra.

Capacity and slot layout. Total capacity depends on the size of each module and the number of slots your board offers. Fitting several smaller modules often gives better memory bandwidth than a few large ones, because modern server processors read from several memory channels at once. Leave empty slots if you expect to expand later.

Speed and compatibility lists. Memory runs at the speed the processor and board support, and populating more slots per channel can lower that speed. Where the board maker publishes a list of tested modules, use it, since it removes most of the guesswork.

Brands we carry

• ASRock: best known for motherboards, with a server and workstation arm, ASRock Rack, that builds server boards, so its parts are designed around the memory requirements of those platforms.

ASRock is the only brand in this category at the moment.

Server memory FAQ

What is the difference between server memory and desktop memory?

Server memory is built for continuous operation and large capacities, and it usually includes ECC and a register chip that lets a board carry many modules. Desktop memory is normally unbuffered and often non-ECC. The two types generally cannot be mixed, and many server boards will not accept desktop modules at all.

Can I use normal desktop RAM in a server?

Only if the server board specifically supports unbuffered modules, which is typical of entry-level tower servers and some workstation boards. Most rack servers require registered ECC memory and will not start with desktop modules. Check the board or server manual for the supported module types before buying.

What does ECC memory do?

ECC memory checks the data it stores and automatically corrects single-bit errors. This prevents silent data corruption and unexpected crashes, which is why it is standard in servers that handle databases, virtual machines or business files. It adds a small cost compared with non-ECC modules.

How do I know which memory my server needs?

Start with the server or motherboard model, then match the memory generation (DDR4 or DDR5), the module type (such as RDIMM) and the supported speed. The manufacturer's manual or compatibility list gives the exact requirements, including the maximum capacity per slot. If you are unsure, compare these details with the product specifications on the listing before ordering.