Recommended Memory Population Order - Cisco UCS C240 M3 Manual

SUPPLEMENTAL MATERIAL

Recommended Memory Population Order

This section explains the recommended DIMM population order rules for the C240 M3 server.
All DIMMs must be DDR3 DIMMs.
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Mixing of Registered and Unbuffered DIMMs is not allowed per platform.
■
Mixing of ECC and non-ECC DIMMs is not allowed per platform.
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Mixing of DIMMs with different timing parameters within one channel is allowed.
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A DDR3-1600 DIMM is allowed only when two DIMM s Per Channel (2DPC) are populated
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When single and dual rank DIMMs are populated for 3DPC, always populate the dual-rank
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DIMM in the blue DIMM slot first (blue slot) and the single-rank DIMM last in the black DIMM
slots.
Follow Table 26 when populating DIMMs in the server.
Table 26 Recommended DIMM Population Order Rules
DIMM Socket DIMM Slot Numbers
BLUE
BLACK
BLACK
B1 F1
BLUE
BLACK
BLACK
Number of 2
DIMMs Per
DIMMs DIMMs
CPU
on
CPU1 CPU2
BLACK
BLACK
BLUE D1 H1
BLACK
BLACK
BLUE
48
A1 E1 A1
B1 F1 B1
B2
2 4 4
DIMMs DIMMs DIMMs
on on on
CPU1 CPU2
D2
D1 H1 D1
C1 G1 C1
NOTE: Columns in yellow have DIMM configurations that do not support memory
mirroring. They do, however, offer superior performance. Columns highlighted in
green do support memory mirroring.
Cisco UCS C240 M3 High-Density Rack Server (Large Form Factor Hard Disk Drive Model)
E1 A1
A2
F1 B1
F2 B2
6 6 8
DIMMs DIMMs
on on on
CPU2 CPU2 CPU1
H2 D2
H1 D1
C2
G1 C1
E1 A1 E1
E2 A2 E2
A3 E3
F1 B1 F1
F2 B2 F2
8 10 10
DIMMs DIMMs DIMMs
on on on
CPU2 CPU2 CPU2
H2 D2 H2
H1 D1 H1
C3 G3
G2 C2 G2
G1 C1 G1
A1 E1
A2 E2
A3 E3
B1 F1
B2 F2
B3 F3
12 12
DIMMs DIMMs
on on
CPU1 CPU2
D3 H3
D2 H2
D1 H1
C3 G3
C2 G2
C1 G1