Cisco Cisco UCS C24 M3 Rack Server Datenbogen

Cisco UCS C240 M3 High-Density Rack Server (Large Form Factor Hard Disk Drive Model)

CONFIGURING the SERVER

Caveats

■

System speed is dependent on how many DIMMs are populated per channel. See

Table 6

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

— DIMM choice

— DIMM population (how many DIMMs per channel are populated)

Table 6 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

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

2DPC

1333

3DPC

1066

Notes . . .

1. NA = not applicable

1066

1600

DIMM

1DPC

1333

1600

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

1333

1600

1333

1600

2DPC

1333

1600

1333

1600

1333

1600

3DPC

1066

1333

1066

1333

1866

DIMM

1DPC

1333

1600

1866

2DPC

1333

1600

1866

3DPC

1066

1333