OWC 128GB (2x64GB) DDR5 4800 CL40 ECC Registered RDIMM for PowerEdge R760xd2

Server memory upgrade

This OWC kit supplies 128GB of DDR5 memory in two 64GB registered ECC modules built for the Dell PowerEdge R760xd2 server. The PC5-38400 4800MHz CL40 specification matches the platform's native memory speed and timing. Registered buffering and error correction protect data integrity in multi-socket workloads. The kit replaces Dell part numbers AC239379 and SNPJ52K5C/64G for direct compatibility.

Build integration

Each 288-pin RDIMM operates at 1.1V and uses a 2Rx4 organisation that the R760xd2 memory controller expects. No heat spreaders are fitted, so airflow through the server's standard DIMM ducts is unimpeded. Modules must be installed in matched pairs per channel and cannot be mixed with unbuffered or load-reduced DIMMs. The registered design reduces electrical load on the memory bus at high capacity.

Sustained operation

JEDEC-compliant DDR5 signalling and on-die ECC maintain signal integrity during continuous read-write cycles typical of database and virtualisation tasks. Registered clock drivers stabilise command timing across all ranks under prolonged thermal stress. The 1.1V operating voltage limits power draw per module while the server's forced-air cooling manages module temperatures. Error correction corrects single-bit faults without halting the system.