I have an ASUS TUF GAMING X670E-PLUS WIFI board with a 7950X3D and an ASUS ROG STRIX 4090 OC and it won’t give me 4.0 x16 on the PCI-E slot. It stays at x8.
I have two disks in M.2_1 and M.2_3 and these shouldn’t limit the GPU when placed like this.
I have also tried moving the disks around and tested one disk etc. Latest BIOS and checked settings with no luck. All drivers are the latest.
I’ve seen other ASUS boards with the same issue that has had this fixed with a new BIOS. So I’m wondering if there is an issue with my board or if the GPU/Motherboard is defective.
Anyone with clues on what I should do next? Is there a BIOS in the works to amend this or should I just RMA the motherboard/GPU?
After consulting with the relevant department, we recommend that you send your motherboard to ASUS service center for further diagnostics.
Please provide a description of the problem when starting the repair process, and our service center will assist you with further investigation.