UDIMM DDR4-2666 PC4-21300

49 products

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This page lists DDR4-2666 PC4-21300 Non-ECC Unbuffered DIMM (UDIMM) — 288-pin, 1.2V, non-ECC, for desktops, workstations and boards that run standard unbuffered memory. DDR4-2666 runs at 2666MT/s (2666MHz data rate) for 21.3 GB/s of bandwidth per channel.

What is on this page

Single modules from 4GB to 32GB (4GB, 8GB, 16GB and 32GB), in 1Rx8, 1Rx16 and 2Rx8 rank configurations, plus matched kits up to 256GB total. Use the Module Density, Kit and Rank filters to narrow the list, or Shop by System Model to jump straight to modules matched to a specific machine.

Where DDR4-2666 UDIMM is used

DDR4-2666 UDIMM is commonly paired with eighth- and ninth-generation Intel Core desktops and laptops — Dell OptiPlex, Latitude, Inspiron and Vostro — and Synology DS+ NAS. On this page the system-matched listings cover Dell, Supermicro, ASRock Rack and ASUS. Match the module to what the system was shipped with — non-ECC unbuffered memory will not work in a slot that requires registered or ECC modules.

Choosing the right UDIMM module

Confirm the board takes unbuffered non-ECC memory — workstation and server boards often require ECC UDIMM or RDIMM instead. Match the speed the platform actually runs; a DDR4-2666 module in a slower platform clocks down. For dual-channel systems, install matched pairs. If you are unsure, send us the system model or the OEM part number and we will confirm fitment before you order.

Buying DDR4-2666 UDIMM direct from NEMIX RAM

NEMIX RAM is a US-based server memory specialist since 1993. Every module is researched, matched and compatibility-tested by NEMIX RAM, JEDEC-compliant, and backed by a lifetime warranty. Purchase orders, net terms and volume pricing are available for business, government and education buyers — request a quote with the part numbers or system models you need, or contact our sales team for fitment help.