I read the warning. From what I understood, my 3080 should work the the gen 3 riser, but it is not. After I install the GPU driver, the screen goes black. The GPU worked when I reattached it directly to the mobo. I would appreciate any clues. Here is XTIA's warning.
Warning: The PCIe riser cable is Gen3 (PCIe 3.0). If you are using a Navi or Ampere GPU along with a B550/X570/Z490/Z590 motherboard, please set your PCIe slot setting from Gen4 (PCIe 4.0) to Gen3 in the BIOS. If you do not change the setting, there is a high risk that you will have video output issues. There’s no need to be concerned about being limited to Gen3, as testing has shown that even with an RTX 3080, there is less than a 5% performance loss downgrading from a Gen4 to Gen3 connection.
You can ignore the above information if you choose PCIE 4.0 riser cable
Warning: The PCIe riser cable is Gen3 (PCIe 3.0). If you are using a Navi or Ampere GPU along with a B550/X570/Z490/Z590 motherboard, please set your PCIe slot setting from Gen4 (PCIe 4.0) to Gen3 in the BIOS. If you do not change the setting, there is a high risk that you will have video output issues. There’s no need to be concerned about being limited to Gen3, as testing has shown that even with an RTX 3080, there is less than a 5% performance loss downgrading from a Gen4 to Gen3 connection.
You can ignore the above information if you choose PCIE 4.0 riser cable
