NEMIX RAM 128GB (2x64GB) DDR5 6400 CL52 4Rx4 1.1V ECC RDIMM memory upgrade

Exact-fit server upgrade

This NEMIX RAM kit delivers 128 GB of DDR5 memory in two 64 GB registered ECC RDIMMs built for the Supermicro X14SDW-40C-SP9F motherboard. The modules run at DDR5-6400 with CL52 latency at 1.1 V, matching the exact rank, voltage and timing the board's memory controller expects. System administrators who need maximum capacity per slot without configuration guesswork will find this kit validated for that platform. It is not suited for workstations or desktops that accept only unbuffered UDIMMs or require different population rules.

DDR5 RDIMM platform limits

The registered DDR5 interface used here offloads electrical load from the memory controller so every slot can run fully populated at rated speed, while on-die ECC corrects single-bit errors before they reach the OS. Bandwidth and latency are fixed by the DDR5-6400 JEDEC standard the board implements; no manual tuning or higher data rates are supported on this platform. Buyers who need more total memory than the board's maximum supported capacity or who require UDIMM or SODIMM form factors cannot use this kit.

4Rx4 registered ECC spec

The decisive specification is the 4Rx4 registered ECC organisation combined with 1.1 V operation at CL52, which the Supermicro X14SDW-40C-SP9F memory controller recognises at full 64 GB per DIMM. If your system manual lists a different rank structure, voltage or form factor, the modules will not post at the rated capacity or speed. Confirm the exact population order and maximum DIMM count in your motherboard documentation before ordering.