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Chapter 3: Maintenance and Component Installation
PCIe Bifurcation Settings
By default, the BIOS will set bifurcation according to the detected PCIe card. Bifurcation
settings can be found in the BIOS under
Advanced > Chipset Configuration > North Bridge
> IIO Configuration > CPU1/CPU2 Configuration
.
If the system configuration deviates from the standard supported setup—for example different
riser cards or NVMe routing—bifurcation may need to be set manually.
BIOS IIO Mapping to Motherboard
CPU
PCIe Port
Motherboard Connectors
Note
CPU1
IOU0
JPCIE1 and 2
No connection
IOU1
JLUIIO2
RSC-D-6G4 (rear slot 1)
IOU3
JAIOM1
AIOM slot P1-AIOM
IOU4
P1_NVME0 to 3
Four NVMe ports from CPU 1
CPU2
IOU0
JAIOM2
AIOM slot P2-AIOM
IOU1
JRUIO2
RSC-DR-6G4 (rear slot 2)
IOU3
JPCIE3 and 4
No connection
IOU4
P2_NVME0 to 3
Four NVMe ports from CPU 2
Figure 3-16. BIOS Screen for PCIe Bifurcation Settings