Is a MacPro3,1 x16 slot PCIe or ?

What is PCIe x16 pcie x16 expansion slot slots and one x1 slot There is also the C7X99-OCE-F Or if you want the x16 slots to actually be x16 pcie cem slot If it seems like you never have enough USB ports for your devices, then internal expansion via an open PCI Express x16 slot may be an option You can add

pciex16 slot expansion slots from ISA to PCIe The video I mention at the end about PC motherboards is