User's Manual

Chapter 1 23
Memory Channel Mode
Single Channel Mode
Single Channel (SC) mode is also referred to as Virtual Single Channel (VSC) mode.
NOTE: Memory channel speed determined by slowest DIMM populated in system
Dual Channel Mode
Single Channel /
Virtual Single Channel
Dual Channel
DIMM Population No restrictions Matching DIMM pairs
Rank(Row) Size Size of one side of the DIMM
populated in the channel
(64MB - 512MB)
2x the size of one side of the DIMM
populated in the channel(A or B)
(128MB - 1GB)
Number of Ranks(Rows) 8 maximum 4 maximum
Channel Size 64 bits 128 bits
Page Size Size read from DIMM
(4KB, 8KB, 16KB)
2 x Size read from DIMM
(8KB, 16KB, 32KB)
Burst Length 4 or 8 4
Memory Channel DIMM Slot Number
Channel A DIMM 1
DIMM 2
Channel B DIMM 3
DIMM 4