pcie x1 edge connector

PCIE Express Connector 164 Pin Plug-in PCI-e 16X Memory Card Slot PCIE Connector

3x PCIe SSD 2280 IO Ports, Front: 2x USB 10Gbps, 1x Combo Kensington Lock slot, Kensington Lock slot Adapter, 330W, 330W

pcie m2 slot 3x PCIe SSD 2280 IO Ports, Front: 2x USB 10Gbps, 1x Combo Kensington Lock slot, Kensington Lock slot Adapter, 330W, 330W

pcie nvme slot Yes, you can Any PCI-e card should work in any socket So an x8 card in a x4 slot will use up