Cisco UCS C220 M3 - Page 19

Cisco UCS Cisco UCS C220 M3 High-Density Rack Server (Large Form Factor Hard Disk Drive Model)
CONFIGURING the SERVER
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(4) 2-CPU configuration with memory mirroring:
■ Select 2, 4, 6, or 8 identical DIMMs per CPU. The DIMMs will be placed by the factory as
shown in the following table. Notice that DIMM placement is different for single-rank and
dual-rank DIMMs.
■ Select the memory mirroring option (N01-MMIRROR) as shown in Ta bl e 4 on page 17.
Number
of
DIMMs
per CPU
CPU 1 DIMM Placement in Channels
(for
identical dual-rank DIMMs)
CPU 2 DIMM Placement in Channels
(for
identical dual-rank DIMMs)
Blue Slots Black Slots Blue Slots Black Slots
2 (A1, B1) — (E1, F1) —
4 (A1,B1); (C1,D1) — (E1,F1); (G1,H1) —
6
1
Notes . . .
1. Not recommended (for performance reasons)
(A1,B1, C1); (A2, B2, C2) (E1,F1, G1); (E2, F2, G2)
8 (A1,B1); (C1,D1) (A2,B2); (C2,D2) (E1,F1); (G1,H1) (E2,F2); (G2,H2)
NOTE: System performance is optimized when the DIMM type and quantity are equal
for both CPUs, and when all channels are filled equally across the CPUs in the server.