Fujitsu PRIMERGY RX2540 M7 — supported memory

2-socket 2U rack. Intel Xeon Scalable 4th Gen (Sapphire Rapids); current datasheet/configurator also list 5th Gen (Emerald Rapids) SKUs. Fujitsu lists only RDIMM (x4/x8/3DS x4) for DDR5; no LRDIMM, no MRDIMM (LRDIMM only appears in the separate DDR4 M6). 32 DIMM slots (16 per CPU, 8 channels x 2), 2 sockets. Sapphire Rapids tops DDR5-4800 (1DPC, 4400 2DPC); DDR5-5600 RDIMMs require 5th Gen Emerald Rapids (down-clock to 4800 on Sapphire). Max per DIMM 256GB (8Rx4 3DS), max system 8TB (32x 256GB).

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 →