Cisco UCS C240 M6 — supported memory

2-socket rack server, dual 3rd Gen Intel Xeon Scalable (Ice Lake) CPUs. 32 DDR4 DIMM slots total (16 per CPU). 8 memory channels per CPU, up to 2 DIMMs per channel (2DPC). Supports registered ECC DDR4 RDIMMs and LRDIMMs (incl. 3DS) at 3200 MT/s; all supported DIMMs run at their labeled 3200 speed at 1DPC and 2DPC when the processor supports that speed. Up to 256 GB per DIMM (256 GB 3DS LRDIMM available on C240 M6 SFF, not LFF). Max 8 TB DRAM (32x 256 GB DIMMs); up to 12 TB total with Intel Optane PMem 200 series (200-series PMem in slot 2 of a channel, DRAM in slot 1). Source: Cisco UCS C220/C240/B200 M6 Memory Guide.

Confirmed = listed in the vendor's memory documentation for this server. Vendor match = the vendor's own part cross-reference matches the module and its speed is validated for the platform; not taken from this server's memory list. Spec match = meets this platform's JEDEC requirements (generation, form factor, validated speed); interchangeability is spec-based, not per-server testing. How we verify →