Figure 37. Memory Population For Single-Channel Failsafe - Intel S7000FC4UR Technical Product Specification

BIOS Initialization
Memory
Riser
DIMM 8
DIMM 7
DIMM 6
DIMM 5
DIMM 4
DIMM 3
DIMM 2
DIMM 1
Channel 0

Figure 37. Memory Population for Single-Channel Failsafe

This configuration:
The population in Branch 0 meets the requirements for single-channel mode only.
The population in Branch 1 meets the requirements for dual-channel mode because the
FBDIMMs installed in the DIMM_1 sockets on Memory Riser Boards C and D are
identical in terms of organization, speed, and size.
The BIOS uses the FBDIMM population of Slot 1 on both Memory Riser Board A and B
(Branch 0) to determine the memory-operating mode. Therefore, the BIOS disables all
FBDIMMs except Memory Riser Board A, DIMM_1 and configures the system for single-
channel mode.
116
A
Channel 1
Branch 0
Intel® Chipset
Memory Controller Hub
Intel® Server System S7000FC4UR
Memory Memory
Riser Riser
C D
DIMM 8 DIMM 8
DIMM 7 DIMM 7
DIMM 6 DIMM 6
DIMM 5 DIMM 5
DIMM 4 DIMM 4
DIMM 3 DIMM 3
DIMM 2 DIMM 2
DIMM 1 DIMM 1
Channel 2 Channel 3
Branch 1
Disabled
Revision 1.0