TYAN B8251T83E8HR-2T-N, Service Engineer'S Manual

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6.3.18 PCIE Slot Configuration
PCIe Slot Bifurcation Configuration
PCIE#1/PCIE#2
Selects PCIe port Bifurcation for PCIE#1/PCIE#2 slots.
Auto / x16 (PCIE#2) / x8x8 (PCIE#2) / x8x8 (PCIE#1/PCIE#2) /
x4x4x4x4 (PCIE#2)
PCIE#3/PCIE#4
Selects PCIe port Bifurcation for PCIE#3/PCIE#4 slots.
Auto / x16 (PCIE#4) / x8x8 (PCIE#4) / x8x8 (PCIE#3/PCIE#4) /
x4x4x4x4 (PCIE#4)
PCIE#5
Selects PCIe port Bifurcation for PCIE#5 slot.
x16 / x8x8 / x4x4x4x4
PCIE#6
Selects PCIe port Bifurcation for PCIE#6 slot.
x16 / x8x8 / x4x4x4x4
PCIE#7/PCIE#8
Selects PCIe port Bifurcation for PCIE#7/PCIE#8 slots.