OWC 256GB (8x32GB) DDR4 3200 CL22 2Rx4 288-pin 1.2V ECC Registered RDIMM memory upgrade

Server memory kit

This 256GB kit contains eight 32GB DDR4 3200 CL22 registered DIMMs built for Cisco UCS B200 M6, C125 M5, C220 M6, C240 M6 and C245 M6 servers. It delivers ECC error correction and registered signalling for stable operation in multi-socket platforms. The modules run at 1.2V and conform to JEDEC PC4-25600 specifications.

Build integration

Each 288-pin RDIMM occupies one memory slot and requires a motherboard that supports registered ECC DDR4; it will not work in standard desktop boards or alongside unbuffered or load-reduced DIMMs. Populating all channels with matched 32GB modules lets the memory controller run at the rated 3200 MT/s without down-clocking. The kit replaces Cisco part numbers 15-107238-01, UCSMRX32G2RW and UCSXMRX32G2RW.

Thermals and power

Bare modules without heat spreaders rely on chassis airflow for cooling; server fans typically keep temperatures well within JEDEC limits at the rated voltage. Registered buffers add slight latency but reduce electrical load on the memory controller, helping overall platform power efficiency. The 1.2V operating voltage matches the DDR4 standard for low-power server deployments.