Pcie Bifurcation Settings - Supermicro SuperServer SYS-121C-TN2R User Manual

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.
Motherboard connector JPCIE3 can provide PCIe lanes to support more NVMe drives, if any.
For NVMe, refer to data cable routing
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.
CPU PCIe Port Motherboard Connectors
IOU0 JPCIE1 and 2
IOU1 JLUIO2
CPU1 IOU2 JAIOM1
IOU3 JNVME1 to 4
IOU4 M.2-C1 and C2
IOU0 JAIOM2
IOU1 JRUIO2
CPU2
IOU2 JPCIE3 and 4
IOU3 No connection
IOU4 JVNME5 to 8
Chapter 3: Maintenance and Component Installation
table.
BIOS IIO Mapping to Motherboard
Note
Additional NVMe
RSC-D 6G5 (rear slot)
AIOM slot P1 AIOM
Four NVMe ports from CPU 1
Two M.2 80 mm from CPU 1
AIOM slot P2-AIOM
RSC-DR 6G5 (rear slot)
Additional NVMe
No connection
Four NVMe ports from CPU 2
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