I just purchased a Dell Inspiron 5675 desktop with a Ryzen 1700x, an SSD, and a Radeon RX580 made by AMD. The motherboard has the X370 chipset and 2 video card slots. Only 1 slot is being used, slot 1 labeled on the motherboard, closest to the CPU. When I look at the hardware settings in the AMD Radeon Settings display, it shows the current video card bus setting as PCI Express 3.0 x8. Shouldn't this be PCI Express 3.0 x16? I am just checking out this new computer to verify proper operation.