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Supermicro X11SCA-F (RTX 4090 not seen by unRAID in x16 Slot #6)

cpthook
in Motherboards and CPUs

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Hello... I was hoping someone had any ideas on why my GPU (RTX 4090) cannot be detected in IOMMU group under system devices when plugged into the PCIe 3.0 x16 Slot 6. The same GPU is detected just fine when in x8 Slot 4. Has anyone experienced the same? Board is Supermicro X11SCA-F.  I've had the MOBO for quite awile and have never tried to plug anything into the x16 slot until now.  I had an RTX 3090 in Slot 4 for about 2 years.

 

Thanks for any ideas.

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