This page lists DDR4-2666 PC4-21300 Load-Reduced DIMM (LRDIMM) — 288-pin, 1.2V, ECC, with a data buffer that reduces electrical load on the memory controller so the highest capacities per channel stay stable. 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 32GB to 256GB (32GB, 64GB, 128GB and 256GB), in 2Rx4, 4Rx4 and 8Rx4 rank configurations, plus matched kits up to 3TB 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 LRDIMM is used
DDR4-2666 LRDIMM is commonly paired with first-generation Intel Xeon Scalable (Skylake-SP) and AMD EPYC 7001 platforms — Dell PowerEdge 14G, HPE ProLiant Gen10, Cisco UCS M5 and Lenovo ThinkSystem. On this page the system-matched listings cover Dell, HPE, Intel server boards, Cisco UCS and Gigabyte. Every part carries the OEM part number it replaces, so a DDR4-2666 order written against a Dell, HPE, Lenovo, Cisco or Supermicro part number can be matched line for line.
Choosing the right LRDIMM module
LRDIMM is for maximum capacity per channel, not maximum speed. It cannot be mixed with RDIMM, and every LRDIMM in a channel should match capacity and rank. Choose DDR4-2666 LRDIMM when the platform's supported maximum needs 64GB, 128GB or 256GB modules in every slot; for smaller totals, DDR4-2666 RDIMM is usually the better fit. 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 LRDIMM 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.
