Riser Cards and PCIe Slots

Looks like most recent ATX motherboards have a dramatically reduced number of PCIe slots

Riser Cards and PCIe Slots PCI vs PCIe Slot · PCI-E x16 slot: It is 89mm long and has 164 pins It is often used for graphics cards and backward compatible with x1 x4

Looks like most recent ATX motherboards have a dramatically reduced number of PCIe slots

pcie slot width Figure 2 The standard PCI Express slot sizes on computers today are x1, x4, x8, and x16 Software compatibility is also ensured by the PCI

PCIe slots come in different sizes, with the most common being PCIe x1, PCIe x4, PCIe x8, and PCIe x16, which indicate the number of lanes

pcie slot function Card capacity and size · Slot 1: gen 4, up to x16 lanes · Slot 2: gen 4, up to x16 lanes · Slot 3: gen 4, up to x8 lanes

The standard supports an x32 slot, but these are rare because of the length An x16 slot accepts up to 16 lanes, but fewer lanes can be assigned