Supermicro C9X299-PGF-L User Manual page 93

Chipset Configuration
Note: Setting incorrect values in the following two submenus may cause system mal-
function.
North Bridge
IIO Configuration

IIO Configuration
Isoc Mode
This feature controls Isoc mode support. The options are Disabled, Enabled, and Auto.
CPU Configuration

IOU0 (IIO PCIe Br1)
This feature controls the port bifurcation for the selected slot(s). The options are
[x4x4x4x4], [x4x4x8], [x8x4x4], [x8x8], [x16], and Auto.
IOU1 (IIO PCIe Br2)
This feature controls the port bifurcation for the selected slot(s). The options are
[x4x4x4x4], [x4x4x8], [x8x4x4], [x8x8], [x16], and Auto.
IOU2 (IIO PCIe Br3)
This feature controls the port bifurcation for the selected slot(s). The options are
[x4x4x4x4], [x4x4x8], [x8x4x4], [x8x8], [x16], and Auto.
CPU SLOT 1 PCI-E 3.0x8 (INx16), CPU SLOT 3 PCI-E 3.0x8 (INx16),
CPU SLOT 5 PCI-E 3.0x8 (INx16), CPU SLOT 7 PCI-E 3.0x16, U.2_1, and
U.2_2 (check)
Note: The features shown above are subject to change depending on the device
plugged into the motherboard.
Link Speed
This feature controls the link speed for this PCIe port. The options are Auto, Gen 1
(2.5 GT/s), Gen 2 (5GT/s), and Gen 3 (8 GT/s).
PCI-E Port Max Payload Size
This feature controls this PCIe port's maximum payload size. If possible set to 256B.
The default is Auto.
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Chapter 4: UEFI BIOS