Is a MacPro3,1 x16 slot PCIe or ?

Is a MacPro3,1 x16 slot PCIe or ? pcie2 slot Placed in a single PCIe slot Supports the single lane PCIe bus interface Provides 512 MB DDR3 graphics memory Supports DVI or VGA hepi8 slot PCIE2 is used for PCI Express x4 lane width graphics cards PCIE1 PCIE2 Ryzen Series CPUs Gen4x16 Gen3x4 Ryzen

hepi8 slot Go in to BIOS and Set PCIE to AUTO or Gen 4 it may be getting hung up on the gen 5 PCIE slot So boot to bios from second slot

realistic slot car layouts Primary riser cage connector, connected to processor 1 or the southbridge PCIe 3-slot riser cage* PCIe 2-slot x16 riser cage 1 PCIe slots and cards A PCIe or PCI express slot is the point of connection between your PC's “peripheral components” and the motherboard