Top uses of the PCIe 1x slot on your motherboard

Fix Consumer Electronics 1 x slot 1 PCIe x16, 1 PCIe x16, 1 PCIe x1; AMD Quad CrossFireX - 1 x PCI Express x1 Slot - Supports AMD Quad CrossFireX™ and CrossFireX 126 slot Also, PCI-X slots are longer than PCIe 1x through PCIe 16x, which makes it impossible to make short cards for PCI-X PCI-X slots take quite a bit of space

1x ddr4 sodimm slot 1 1 x USB Port 2 1 x Console Port 3 2 x GE RJ45 MGMTHA Ports 4 16 x GE RJ45 Ports 5 4 x 1GE10GE SFP+ Slots 6 4 x 10GE SFP+ Ultra Low Latency