PCIe x16 GPU card into a PCIe x8 slot?

The 'x16′ indicates the maximum number of PCI Express lanes supported and thus, the length of the slot As version , each lane provides

Supports AMD AM4 Socket Ryzen™ 2000, 3000, 4000 G-Series, 5000 and 5000 G-Series Desktop Processors; Supports DDR4 3533+ ; 1 PCIe x16, 1 PCIe

slot bonuses However, there is usually a cost increase incurred with higher lane counts PCIe Slot Differences Photo from 20050531pci-express-cards

slot 500 Maybe you have a hair or something else blocking a contact in your PCIe slot Or a bent socket pin Or a defective motherboard Or a defective