RDIMM DDR5-6400 PC5-51200

343 products

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This page lists DDR5-6400 PC5-51200 ECC Registered DIMM (RDIMM) — 288-pin, 1.1V, ECC, with a register buffering the command and address lines so servers can populate more slots per channel at full speed. DDR5-6400 runs at 6400MT/s (6400MHz data rate) for 51.2 GB/s of bandwidth per channel.

What is on this page

Single modules from 16GB to 256GB (16GB, 24GB, 32GB, 48GB, 64GB, 96GB, 128GB and 256GB), in 1Rx4, 1Rx8, 2Rx4, 2Rx8, 4Rx4 and 8Rx4 rank configurations, plus matched kits up to 4TB 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 DDR5-6400 RDIMM is used

DDR5-6400 RDIMM is commonly paired with Intel Xeon 6 (Granite Rapids) and AMD EPYC 9005 (Turin) platforms — Dell PowerEdge 17G, HPE ProLiant Gen12, Supermicro X14/H14, Gigabyte and ASRock Rack boards. On this page the system-matched listings cover HPE, ASRock Rack, Gigabyte, Dell and Supermicro. Every part carries the OEM part number it replaces, so a DDR5-6400 order written against a Dell, HPE, Lenovo, Cisco or Supermicro part number can be matched line for line.

Choosing the right RDIMM module

RDIMM and LRDIMM cannot be mixed in the same system. Within RDIMM, match rank organization (1Rx4, 2Rx4, 2Rx8) to what the platform already runs where possible — mixed ranks are usually supported but can lower the effective speed. A DDR5-6400 module in a platform rated for a slower speed clocks down to the platform's speed; a slower module in a DDR5-6400 platform pulls every channel down to the slower speed. If you are unsure, send us the system model or the OEM part number and we will confirm fitment before you order.

Buying DDR5-6400 RDIMM 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.