I have an AMD brand RX580 GPU, X370 chipset and Ryzex 1700X cpu. When I check the GPU settings using GPU-Z, or any other method, it shows the video card is capable of PCIe 3.0 x16 but is currently connected an PCIe x8 1.1. When I load it using FurMark, it changes to PCIe x8 3.0. It never shows PCIe x16. Is this normal?