PCIe 4.0 x8

Why is my RTX 3080 Ti running at PCIe 4.0 x8 instead of x16?

I'm having trouble getting my RTX 3080 Ti to negotiate a PCIe 4.0 x16 link. My system uses a Gigabyte Z690 UD DDR4, Core i7-12700K, 32 GB of…