DDR4 Server & Workstation Memory

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This page lists every DDR4 ECC memory module NEMIX RAM supplies for servers and workstations — ECC Registered DIMM (RDIMM), Load-Reduced DIMM (LRDIMM), ECC Unbuffered DIMM (ECC UDIMM) and ECC SODIMM — from DDR4-2133 to DDR4-3200. DDR4 remains the installed base in most data centers, and every module here carries ECC for error detection and correction, the standard for servers, storage and professional workstations.

What is on this page

Single modules from 4GB to 256GB (4GB, 8GB, 16GB, 32GB, 64GB, 128GB and 256GB) in 1Rx4, 1Rx8, 2Rx4, 2Rx8, 4Rx4 and 8Rx4 rank configurations, plus matched kits up to 4TB total. Start with Form Factor — RDIMM or LRDIMM for rack and tower servers, ECC UDIMM for entry servers, single-socket workstations and NAS, ECC SODIMM for compact systems and NAS appliances — then narrow by Technology Speed, Module Density, Kit and Rank, or use Shop by System Model to jump straight to modules matched to a specific machine.

Where DDR4 ECC memory is used

DDR4 RDIMM and LRDIMM are commonly paired with Intel Xeon E5 v3/v4 and Xeon Scalable 1st, 2nd and 3rd Gen, Xeon W, and AMD EPYC 7001/7002/7003 and Threadripper PRO platforms — Dell PowerEdge 13G/14G/15G, HPE ProLiant Gen9/Gen10/Gen10 Plus, Cisco UCS M4/M5/M6, Lenovo ThinkSystem and Supermicro X10–X12 and H11/H12 boards. DDR4 ECC UDIMM and ECC SODIMM are commonly paired with Intel Xeon E-2100/2200/2300 and Xeon D, AMD Ryzen PRO and EPYC 3000, and NAS systems from Synology, QNAP and Asustor. System-matched listings on this page include Dell PowerEdge, HPE and Cisco.

Choosing the right DDR4 server module

RDIMM and LRDIMM cannot be mixed in the same system, and neither can be mixed with ECC UDIMM — start from what the platform already runs. Within RDIMM, match rank organization (1Rx4, 2Rx4, 2Rx8) to the installed modules where possible; mixed ranks can lower the effective speed. LRDIMM is the route to the highest capacity per slot (128GB and 256GB). A faster module in a slower platform clocks down to the platform's speed, and a slower module pulls every channel down to its own speed. ECC UDIMM and ECC SODIMM run as ECC only on boards and processors that support it. If you are unsure, send us the system model or the OEM part number and we will confirm fitment before you order.

Buying DDR4 server memory 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.

Also searched as DDR4 server memory, DDR4 ECC RAM, DDR4 ECC RDIMM, DDR4 LRDIMM, DDR4 registered memory, DDR4 ECC unbuffered, DDR4 workstation memory, PC4 server RAM.