This category covers DDR3, DDR3L and DDR2 memory modules for older desktop PCs, laptops and servers that are worth upgrading rather than replacing. Most are 240-pin DIMMs, and some are SO-DIMMs. Our range includes over 280 models, with brands such as 2-POWER, COREPARTS, G.SKILL, Kingston and HP Enterprise.
How to choose DDR3 and older memory
Memory type. The module type must match the motherboard exactly, because DDR2, DDR3 and DDR3L modules differ in their slot notch and cannot be swapped. Most of our range is DDR3, with some DDR3L and DDR2. DDR3L runs at a lower voltage and is common in laptops, but always check the device manufacturer's specification.
Form factor. Desktop PCs and servers use 240-pin DIMMs, while laptops use SO-DIMMs (204-pin for DDR3, 200-pin for DDR2). Most of our range is DIMM and only a few SO-DIMM modules are listed, so laptop owners should check availability with care.
Capacity and kit. You will find 2, 4, 8 and 16 GB modules, as well as 2 x 4 GB kits. Before buying, check how much memory the motherboard supports and how many slots are free. Dual-channel mode works best with two identical modules, so a pair of 4 GB modules is often a more practical choice than a single one.
Speed and latency. Our range includes 667, 800, 1333 and 1600 MHz modules, with a few at 1866 MHz. If the board supports only a lower speed, the module will run at that speed, so there is no point paying extra for a faster one. CAS latency (mostly 9 or 11 in our range) changes little in everyday use, and compatibility matters far more.
ECC support. ECC memory corrects single-bit data errors, which is why servers and workstations often require it. Our range includes both ECC and non-ECC modules. Ordinary desktop motherboards usually do not support ECC, and some servers require registered memory, so check the device documentation.
Brands we carry
- 2-POWER and COREPARTS: these modules are made to be compatible with branded servers, laptops and workstations, and they account for most of our range.
- G.SKILL: known for enthusiast memory with higher speeds, sold in kits for gaming PCs.
- HP Enterprise, HP Inc., Dell and Lenovo: original modules for the manufacturers' own servers, workstations and laptops, useful when you want to keep a vendor-approved configuration.
- Kingston: known for its ValueRAM line, aimed at standard desktop PCs and servers.
- Patriot Memory and Mushkin: both also make memory for gaming and PC tuning enthusiasts.
Also in our range: AFOX, GOODRAM.
Frequently asked questions about DDR3 memory
Can DDR3 memory be used in a DDR4 motherboard?
No, a DDR3 module does not fit a DDR4 slot and is not electrically compatible with it. The notch sits in a different position, so the module cannot be inserted. To use DDR3 you need a motherboard designed for that type.
What is the difference between DDR3 and DDR3L?
DDR3L runs at a lower voltage than standard DDR3, so it produces less heat and uses less power. It is often found in laptops. Whether a board accepts both types is decided by its manufacturer, so check the specification first.
How much RAM does an older computer need?
For an older office or home PC running Windows, 8 GB is usually enough, and 4 GB can still cope with browsing and documents. What matters is how much the motherboard and operating system support. 32-bit Windows can use only about 4 GB, so more memory will make no difference there.
Can I mix different memory modules?
Usually yes, but identical modules with the same type, capacity and speed work best. Modules with different speeds will run at the slower one, and incompatible ones may stop the computer from starting. If you want dual-channel mode, choose a pair of the same capacity or a matched kit.
