What are the standard PCIe sizes?

4 Shared PCIe Slots: According to the specifications provided by PCI-SIG, there are 7 versions of PCI-E x1, x2, x4, x8, x12, x16 and x32

It's a little unusual in that you don't often see motherboards which have both PCI-Express slots and an AGP slot The best slot to use for video cards is the

pcie slot qrelease PCIe x16 slot While the amount of data being “crunched” by Technically x32 slots do exist, but they're very rare 2 7,880MBs

pciex16 slot PCIe x1: These are the smallest PCIe slots, used for almost any other cards like average network adapters and USB expansion cards PCIe x4: