We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in

Memory Upgrades for Specific Laptops and PCs

Memory modules matched to particular laptop, desktop and workstation models, from DDR and DDR2 through DDR3 and DDR4, in DIMM and SO-DIMM sizes. 21,161 products from $4.99 to $75,686.99. NEMIX RAM, Computer Memory Solutions, OWC and more.

21,161 products from $4.99

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

21,161 results · page 1 of 353

Sort: Featured

Pin count and voltage: the generation has to match

Older systems are fussy, and the title of a listing usually gives the pin count: 204-pin DDR3 SO-DIMM and 260-pin DDR4 SO-DIMM for laptops and compact PCs, 240-pin DDR3 and 288-pin DDR4 DIMM for desktops, and 200-pin DDR2 SO-DIMM or 240-pin DDR2 for earlier machines. Each generation has a different notch, so a module will not seat in the wrong slot. Voltage differs too: DDR3 runs at 1.5 V, low-voltage DDR3L at 1.35 V, and DDR2 at 1.8 V.

If a system was designed for 1.35 V low-voltage memory, follow its manual rather than assuming a standard 1.5 V module will do. SO-DIMM is the short laptop and mini-PC format, while full-size DIMM goes in desktops and workstations; they are not interchangeable. Very old DDR and DDR2 modules such as the 184-pin and 200-pin types are still listed for legacy repairs, where the speed grade, such as PC2 5300 or PC2 6400, is worth matching to the module already installed.

Reading your system's memory limits

The system manual or the maker's compatibility tool is the real authority. It lists the number of slots, the largest module each slot accepts, the total capacity and the fastest speed supported; a faster module simply runs at the system's limit. Fit modules in pairs when the board runs dual-channel, so that two matched modules double the width of the memory path. A 32-bit desktop version of Windows uses no more than 4 GB, usually only about 3 to 3.5 GB, whatever is fitted. ECC or registered modules belong only in servers and workstations that call for them.

Questions about Memory Upgrades for Specific Laptops and PCs

What is the difference between DIMM and SO-DIMM?
DIMM is the full-size module used in desktops and servers. SO-DIMM is about half the length and goes in laptops, mini PCs and some all-in-one computers. They are not interchangeable, and each memory generation has its own pin count and notch position.
Can I put faster memory in an older system?
Usually yes, if the generation and pin count match. The system will run the module at the highest speed it supports, so the extra rating goes unused. The slot count and capacity limit in the manual matter more than the speed label.
Why are some modules sold as kits of two?
A kit holds two modules tested together so the system can run dual-channel mode, which widens the path to the processor. Matched kits are a safer route than combining separate single modules from different batches.