Cisco UCS B200 M3 Blade Server
16
CONFIGURING the SERVER
Caveats
■
System speed is dependent on how many DIMMs are populated per channel. See
Table 7
for
details.
■
For optimum performance, do not mix DIMMs with different frequencies. If you mix DIMM
frequencies, the system defaults to the lower frequency.
■
Do not mix RDIMMs with LRDIMMs
■
DIMMs for CPU 1 and CPU 2 (when populated) must always be configured identically.
■
Memory mirroring reduces the amount of available memory by 50% (quantity of DIMMs must
be even for mirroring).
■
By default, starting with UCSM 2.0.4, DIMMs run in memory performance mode (1.5v) by
BIOS default, which yields faster memory speeds than when the BIOS is set for the memory
to run in power-savings mode. Memory speed is dependent on factors such as:
— CPU choice
Table 7 DIMM Memory Speeds
DIMM
Speed
DPC
1333-MHz Capable CPU
1600-MHz Capable CPU
1866-MHz Capable CPU
LRDIMM
RDIMM
(DR, SR)
LRDIMM
RDIMM
(DR, SR)
LRDIMM
RDIMM
(DR, SR)
Voltages
Voltages
Voltages
Voltages
Voltages
Voltages
1.3 V 1.5 V
1.3 V
1.5 V
1.3 V
1.5 V
1.3 V
1.5 V
1.3 V
1.5 V
1.3 V
1.5 V
1333
DIMM
1DPC
1333
1333
1333
1333
1333
1333
1333
1333
1333
1333
1333
1333
2DPC
1333
1333
1333
1333
1333
1333
1333
1333
1333
1333
1333
1333
3DPC
1066
1066
NA
1
Notes...
1. NA = not applicable
1066
1066
1066
NA
1
1066
1066
1066
NA
1
1066
1600
DIMM
1DPC
1333
1333
1333
1333
1600
2
2. These DIMMs operate at 1333 MHz instead of 1600 MHz when used with any E5-2600 CPUs. They operate at 1600
MHz when used with E5-2600 v2 CPUs that support 1600- and 1866-MHz speeds.
1600
2
1333
1600
1600
2
1600
2
1333
1600
2DPC
1333
1333
1333
1333
1600
2
1600
2
1333
1600
1600
2
1600
2
1333
1600
3DPC
1066
1066
NA
1
1066
1066
1066
NA
1
1333
3
3. For E5-2600 v2 CPUs, 8-GB 1600-MHz DIMMs at 3 DIMMs per channel currently are set to operate at 1066 MHz
instead of 1333 MHz
1066
1066
NA
1
1333
3
1866
DIMM
4
4. 1866-MHz DIMMs are only offered and supported with E5-2600 v2 CPU-configured servers
1DPC
NA
1
1333
NA
1
1333
NA
1
1600
NA
1
1600
NA
1
1866
NA
1
1866
2DPC
NA
1
1333
NA
1
1333
NA
1
1600
NA
1
1600
NA
1
1866
NA
1
1866
3DPC
NA
1
1066
NA
1
1066
NA
1
1066
NA
1
1333
NA
1
1333
NA
1
1333