So I wanted to run a bifurcated card on my shiny new X11DPI-T and was... befuddled to say the least...
These are the options according to the manual (for each CPU):
CPU1 Configuration/CPU2 Configuration
IOU0 (IIO PCIe Br1)
This item configures the PCI-E Bifuraction setting for a PCI-E port specified by the user.
The options are x4x4x4x4, x4x4x8, x8x4x4, x8x8, x16, and Auto
IOU1 (IIO PCIe Br2)
This item configures the PCI-E Bifuraction setting for a PCI-E port specified by the user.
The options are x4x4x4x4, x4x4x8, x8x4x4, x8x8, x16, and Auto
IOU2 (IIO PCIe Br3)
This item configures the PCI-E Bifuraction setting for a PCI-E port specified by the user.
The options are x4x4x4x4, x4x4x8, x8x4x4, x8x8, x16, and Auto
MCP0 (IIO PCIe Br4)
This item configures the PCI-E Bifuraction setting for a PCI-E port specified by the user.
The options are x16 and Auto
MCP1 (IIO PCIe Br5)
This item configures the PCI-E Bifuraction setting for a PCI-E port specified by the user.
The options are x16 and Auto
So after fiddling for a bit I mailed SM support and they sent me back a nifty little manual how to enable bifurcation. Turns out I was not the first (and will not be the last); so I thought I share it.
Basically you have to look up the CPU to Slot diagram in your boards manual, identify the n-th port per CPU and can then assign that specific port the desired bifurcation level. Things are made more complicated since all PCI-e lanes are listed here and only some are actual slots and only some are bifurcation capable to a certain degree (mostly because they are not bifurcated yet).
These are the options according to the manual (for each CPU):
CPU1 Configuration/CPU2 Configuration
IOU0 (IIO PCIe Br1)
This item configures the PCI-E Bifuraction setting for a PCI-E port specified by the user.
The options are x4x4x4x4, x4x4x8, x8x4x4, x8x8, x16, and Auto
IOU1 (IIO PCIe Br2)
This item configures the PCI-E Bifuraction setting for a PCI-E port specified by the user.
The options are x4x4x4x4, x4x4x8, x8x4x4, x8x8, x16, and Auto
IOU2 (IIO PCIe Br3)
This item configures the PCI-E Bifuraction setting for a PCI-E port specified by the user.
The options are x4x4x4x4, x4x4x8, x8x4x4, x8x8, x16, and Auto
MCP0 (IIO PCIe Br4)
This item configures the PCI-E Bifuraction setting for a PCI-E port specified by the user.
The options are x16 and Auto
MCP1 (IIO PCIe Br5)
This item configures the PCI-E Bifuraction setting for a PCI-E port specified by the user.
The options are x16 and Auto
So after fiddling for a bit I mailed SM support and they sent me back a nifty little manual how to enable bifurcation. Turns out I was not the first (and will not be the last); so I thought I share it.
Basically you have to look up the CPU to Slot diagram in your boards manual, identify the n-th port per CPU and can then assign that specific port the desired bifurcation level. Things are made more complicated since all PCI-e lanes are listed here and only some are actual slots and only some are bifurcation capable to a certain degree (mostly because they are not bifurcated yet).
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