Dimm Population Rules - Cisco UCS B200 M3 Spec Sheet

DIMM Population Rules

When considering the memory configuration of your server, you should take into account the following:
For optimum performance, populate at least one DIMM per memory channel per CPU.
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Do not mix RDIMMs with LRDIMMs.
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Each channel has three DIMM slots (for example, channel A = slots A0, A1, and A2).
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When both CPUs are installed, populate the DIMM slots of each CPU identically.
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Observe the DIMM rules shown in
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Table 24 DIMM Rules for B200 M3 Servers
DIMM Parameter
DIMM Capacity
RDIMM = 16, 8, or 4 GB
LRDIMM = 32 GB
DIMM Speed
1866, 1600 or 1333 MHz
DIMM Type
RDIMMs or LRDIMMs
DIMMs per Channel (DPC)
Notes...
1. Although you can have different DIMM capacities in the same bank, this will result in less than optimal
performance. For optimal performance, all DIMMs in the same bank should be identical.
2. Only 1866-, 1600-, and 1333-MHz DIMMs are currently available for the B200 M3 server.
Cisco UCS B200 M3 Blade Server
A channel can operate with one, two, or three DIMMs installed.
If a channel has only one DIMM, populate slot 0 first (the blue slot).
Fill bank 0 blue slots in the channels first: A0, E0, B0, F0, C0, G0, D0, H0
Fill bank 1 black slots in the channels second: A1, E1, B1, F1, C1, G1, D1, H1
Fill bank 2 white slots in the channels third: A2, E2, B2, F2, C2, G2, D2, H2
DIMMs in the Same Channel
DIMMs in the same channel (for
example, A0, A1, A2) can have
different capacities.
You cannot mix 32 GB LRDIMMs with
any RDIMM.
DIMMs will run at the lowest speed of
2
the DIMMs/CPUs installed.
You cannot mix LRDIMMs with
RDIMMS.
1 DPC or 2 DPC
See Table 7 on page 16
valid LRDIMM and RDIMM 1 DPC and 2
DPC memory configurations
Table 24
DIMMs in the Same Bank
For best performance, DIMMs in the
same bank (for example, A0, B0,
C0, D0) should have the same
capacity.
You cannot mix 32 GB LRDIMMs with
any RDIMM.
DIMMs will run at the lowest speed
of the DIMMs/CPUs installed.
You cannot mix LRDIMMs with
RDIMMS.
3 DPC
for See
valid LRDIMM and RDIMM 3 DPC
configurations
SUPPLEMENTAL MATERIAL
1
Table 7 on page 16 for
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