16 Sun Blade X6270 Server Module Installation Guide • December 2009
DIMM Population Rules
The DIMM population rules for the Sun Blade X6270 Server Module are as follows:
1. Do not populate any DIMM socket next to an empty CPU socket. Each processor
contains a separate memory controller.
2. Each CPU can support a maximum of:
■ Nine dual-rank (DR) or single-rank (SR) DIMMs; or
■ Six quad-rank (QR) DIMMs with two per memory channel; or
■ Three QR DIMMs with one per channel and three DR or SR DIMMs.
3. Populate DIMMs by location according to the following rules:
CPU 1 location
Channel locations for CPU 0
Three channels per CPU with
each channel containing three
color-coded DIMM slots (black,
white, and blue)
Channel locations for CPU 1
Three channels per CPU with
each channel containing three
color-coded DIMM slots (blue,
white and black).
DIMM slot numbering per CPU;
with D8 as the farthest slot away
from CPU
P0:
P1:
Figure Leg end CPU and DIMM Layout
