Hi. I've been trying to figure an issue I'm having and I noticed that Radeon Settings reports my Current Bus Setting as x8 only. It should be x16. I tried the GPU on the single x16 slot of two different motherboards, and it's always x8 when at PCIe 3 speed. When at 1.1 the Current Bus Setting becomes "Not Available".
(I verified if some BIOS setting or connector was impacting my PCI lane, it's not this. Seems to be the GPU itself.)
Could you please take a look at your settings (Radeon Settings > System > Hardware Radeon(TM) RX 460 Graphics Card) and report back with the bus speed and size, and the size of the slot you're using? Thanks!