Desktop Memory — Non-ECC Unbuffered DIMM

Exact-generation DIMM upgrades from DDR through DDR4, matched by pin count and speed

About Desktop Memory

Desktop memory upgrades fail more often from a mismatched generation than a bad module — a motherboard built for DDR2 will not accept DDR3, and pin count alone (168 vs 184 vs 240) tells you which era you're dealing with. We stock non-ECC unbuffered DIMM memory across DDR, DDR2, DDR3 and DDR4, largely OEM modules pulled from Dell, HP, IBM and generic desktops plus retail Crucial, Kingston and Micron stock, many listings referencing the exact motherboard they were validated against.

Generations in Stock

DDR (184-pin, PC2700/PC3200) — Pentium 4 and early Athlon-era desktops
DDR2 (240-pin, PC2-4200 through PC2-6400) — the mid-2000s Core 2 Duo generation
DDR3 (240-pin, PC3-10600 and up) — the most common generation still in active desktop use
DDR4 (288-pin, PC4-19200+) — current-generation desktop memory

DDR generations are not interchangeable — a DDR2 module physically will not seat in a DDR3 slot even though both use 240 pins, because the notch position differs. Send us your desktop or motherboard model and we'll confirm the exact DIMM generation, speed, and maximum capacity your board supports.

Featured Desktop Memory Products

Browse all 55,388 Desktop Memory SKUs.

Frequently Asked Questions

How do I know which DDR generation my desktop needs?

Check your motherboard model or your desktop's service tag/model number — the manufacturer's spec sheet lists the supported DIMM type. Physically, DDR/DDR2/DDR3/DDR4 modules have different notch positions specifically so an incompatible module cannot be forced into the wrong slot. If unsure, send us the system model and we will confirm before you order.

Can I mix memory speeds, e.g. PC3-10600 with PC3-12800?

Yes, in most cases — the memory controller will run all installed modules at the speed of the slowest one. Mixing is safe for compatibility but you will not get the benefit of the faster module's rated speed. For best performance and stability, match speed as well as generation when possible.

Is this ECC or non-ECC memory?

This category is non-ECC unbuffered DIMM memory, the type used in desktop and workstation motherboards. If you need ECC registered (RDIMM) memory for a server, see our server memory hubs instead — server and desktop memory are not interchangeable.