Pcie Bifurcation Settings - Supermicro SuperServer 620C-TN12R 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. Before modifying bifurcation
settings, verify that the riser card cables (if any) are connected correctly, as described in the
riser card cable routing table.
Motherboard connectors JPCIE1 to 4 can provide PCIe lanes to the riser cards or support
more NVMe drives. For NVMe, refer to
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 JLUIIO2
CPU1
IOU3 JAIOM1
IOU4 P1_NVME0 to 3
IOU0 JAIOM2
IOU1 JRUIO2
CPU2
IOU3 JPCIE3 and 4
IOU4 P2_NVME0 to 3
Figure 3-22. BIOS Screen for PCIe Bifurcation Settings
Chapter 3: Maintenance and Component Installation
data cable routing
BIOS IIO Mapping to Motherboard
Note
RSC-D2-668G4 (rear slots 1-2); or additional NVMe
RSC-D2-668G4 (rear slot 3)
AIOM slot P1-AIOM
Four NVMe ports from CPU 1
AIOM slot P2-AIOM
RSC-D2R-668G4 (rear slot 3)
RSC-D2R-668G4 (rear slots 1-2); or additional
NVMe
Four NVMe ports from CPU 2
60
table.