Figure 38. Memory Population For Dual-Channel Configuration On One Branch - Intel S7000FC4UR Technical Product Specification

Intel® Server System S7000FC4UR TPS
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pair

Figure 38. Memory Population for Dual-Channel Configuration on One Branch

This configuration:
Minimal dual-channel, single branch configuration is one lock-step FBDIMM pair in the
DIMM_1 socket on Memory Riser Boards A and B. Additional lock-step pairs can be
populated to increase system memory as desired.
Less efficient in performance than the dual-channel, dual-branch configuration below
because the load is all on one branch.
FBDIMM lock-stepped pair in identically-numbered DIMM slots on both memory riser
boards must be identical in organization, size, and speed for dual-channel operation for
the system to operate in dual-channel mode.
The BIOS enables all installed FBDIMM modules and configures the system for dual-
channel mode.
Revision 1.0
Memory
Memory
Riser
Riser
A B
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 0 Channel 1
Branch 0
Intel® Chipset
Memory Controller Hub
Channel 2 Channel 3
Branch 1
BIOS Initialization
117