What is the difference between PCIe Gen 3 and PCIe Gen 4?

slots and one x1 slot There is also the C7X99-OCE-F Or if you want the x16 slots to actually be x16

2 is a slot that can interface with SATA , PCI Express

pcie x1 slot function PCI-E x16 Expansion Slot -- HPC-7140 Supplier: Advantech Description: 1U Rackmount Server Chassis for MircoATXATX Server board with 4 x Hot-swap Drive

pcie m2 slot SATA 3 Expansion Cards; Network Adaptors; Video Capture Cards PCIe x8 & PCIe x16 Slots: