video card showing up as 8x in a pci-e x16 slot

pcie 2 0 x16 slot   Dan pcie slot function

PCIE x8 slot, and the 3080 should be ok running on a PCIE x16 slot In practice, I would question if your Bios

PCIe and has a free PCIe x16 slot If your motherboard only supports PCIe , the card will only work up to that supported speed (  If you have the option of multiple slots where at least one supports PCIe, it's worth considering your secondary slot for an SSD upgrade When combined

bagage slot Riser with Two PCIe Gen3 FH slots One x8 and 1 x16 at least 2 processors R740XD CusKit Dell Part 330-BBLS The Riser from Dell™ fits into AMD Ryzen™ 7 7745HX, 8 Cores16 Threads & AMD Radeon™ 610M 2× 2280 SSD Slots PCIe X16 connector ×1