Manual

51
Upgrading the system memory
System memory interface
The system has eighteen DIMM slots. Each CPU controls nine slots. The
DIMM slots support DDR3-1333 registered/unbuffered ECC memory
modules. For single rank and dual rank RDIMM, a maximum 3 DIMMs
per channel and a total 18 DIMMs can be supported. For UDIMMs and
quad rank RDIMMs, only 2 DIMMs per channel are supported and
maximum total 12 DIMMs.
• Each CPU has three memory channels (channel 1, 2 and 3).
• Each channel has 3 slots.
To maximize the memory performance, the DIMM modules should be
installed as balanced as possible among processors and memory
channels. And slots with the same slot number across memory channels
should be populated with identical DIMM.
Independent Mode
Independent mode single processor configuration:
Notes: 1. Place DIMMs in “X” location.
2. DIMM population must correspond to the above tables.
Channel 1
DIMM slots
Channel 2
DIMM slots
Channel 3
DIMM slots
Notes
Configuration 1C 1B 1A 2C 2B 2A 3C 3B 3A
AX
BXX
CXXX
DXXXX
EXXXXXX
F XXXXXXXXXSR, DR RDIMMS
ONLY