NEMIX RAM DDR5 6400 CL52 128GB 2x64GB RDIMM ECC Registered Supermicro H13SSW memory upgrade

Capacity and fit

This 128 GB kit delivers two 64 GB DDR5 RDIMMs rated at 6400 MT/s with CL52 latency and 1.1 V operation. The modules use a 2Rx4 registered ECC design that matches the Supermicro H13SSW memory controller requirements for full-capacity recognition at rated speed.

Build integration

Each stick uses the 288-pin RDIMM form factor so it seats only in registered DIMM slots, not UDIMM or SODIMM sockets. The registered architecture buffers address and command signals, allowing the memory controller to drive a fully populated configuration without signal degradation. On-die ECC corrects single-bit errors in flight, preventing silent data corruption that could halt production workloads.

Upgrade context

This kit replaces lower-capacity or slower DDR5 RDIMMs when the server needs maximum registered memory per channel at the platform's native data rate. The jump is worthwhile when the workload demands the full 128 GB at 6400 MT/s with hardware error correction and the motherboard's qualified-vendor list includes this part number. Builders needing unbuffered DIMMs, SODIMMs, or a different voltage or rank structure should look elsewhere.