NEMIX RAM 768GB (6x128GB) DDR5 4800 CL40 1.1V ECC RDIMM Cisco UCS C220 M7

Cisco UCS C220 M7 DDR5 Kit

This 768 GB kit contains six 128 GB DDR5 ECC registered DIMMs built for the Cisco UCS C220 M7 rack server. Each module runs at 4800 MT/s with CL40 latency at 1.1 V. The 4Rx4 organisation and 288-pin RDIMM form factor match the platform's memory architecture. IT teams use this kit to maximise capacity in a single chassis.

Registered ECC at 4800 MT/s

The registered ECC design and 4800 MT/s data rate are the decisive specifications for this server. Error correction protects data integrity under sustained load while the register reduces electrical loading on the memory bus. The 4Rx4 density enables 128 GB per module so the six-slot kit reaches 768 GB without exceeding the platform's rank limits. Systems that require unbuffered or non-ECC memory cannot use these modules.

Six-module installation

Installing six identical DIMMs follows the server's documented population order; the keyed 288-pin connector prevents misalignment. Common issues arise when slots are filled out of sequence or when firmware is not updated before the upgrade, which can prevent the system from recognising the full capacity. Verify the memory configuration in BIOS after installation to confirm all 768 GB are active.