04-07-2022 09:54 AM
04-07-2022 02:52 PM
The moment you use any other PCIe x16 slot (your soundcard in this case)
The #1 slot drops to x8
04-07-2022 04:04 PM
04-07-2022 08:56 PM
Do you have an M.2 drive in the top bay (M.2_1)? It shares lanes with the top PCIE slot (the GPU slot), so putting an M.2 drive in M.2_1 will also drop the gpu slot to x8. M.2_2 and M.2_3 can be used without impacting the top PCIE slot, as can the HyperM.2 Card in the bottom slot.
GPU_Z reports fine for me. I have a 3090 in the top PCIE slot, Samsung 980 Pro nvme drives in M.2_2 and M.2_3, and the HyperM.2 Card in the bottom slot currently with (1) Samsung Pro nvme. GPU-Z shows x16 for my 3090 when rendering.