Datasheet

Cisco UCS B200 M4 Blade Server

CONFIGURING the SERVER

■ Single-rank DIMMs can be mixed with dual-rank DIMMs in the same channel

■ Do not mix quad-rank DIMMs with single- or dual-rank DIMMs in the same channel

■ For best performance, observe the following:

— DIMMs with different timing parameters can be installed on different slots within the

same channel, but only timings that support the slowest DIMM will be applied to all.

As a consequence, faster DIMMs will be operated at timings supported by the slowest

DIMM populated.

— When single, dual or quad rank DIMMs are populated for 2DPC or 3DPC, always

populate the higher number rank DIMM first (starting from the slot farthest from the

CPU). For a 3DPC example, first populate with quad-rank DIMMs in DIMM slot 1. Then

dual-rank DIMMs in DIMM slot 2. Then single-rank DIMMs in DIMM slot 3.

■ DIMMs for CPU 1 and CPU 2 (when populated) must always be configured identically.

■ When using mirroring, DIMMs must be installed in identical pairs across paired DDR4 buses.

That is, mirrored pairs in channels A and B must be identical and pairs in channels C and D

must be identical. However, the DIMMs used in channels A and B can be different from those

in channels C and D.

■ Pairs of DIMMs (A1/B1, A2/B2, etc) must be the exact same (same PID and DIMM loading

order)

■ Cisco memory from previous generation servers (DDR3) is not compatible with this server

For more information regarding memory, see CPUs and DIMMs on page 40.