How to find out if your computer has a PCI express x16 slot

Concept Product CP074-1 4 x NVMe SSD to PCIe x16 Mobile Rack for PCIe Expansion Slot with Blower Fan and Aluminum Heatsink

Supported expansion board 1 PCIe FlexibleLOM HL, FH FlexibleLOM x16 x8 16, 8, 4, 1 Four-port 1 GB NIC card SSD enablement board 2 PCIe

pcie x4 in x16 slot PCI Express expansion slots Desktop systems often offer a x16 slot intended for graphics cards and a x1 slot for PCI Express peripherals

pcie nvme slot x1, x2, x4, x8, x16, and x32 A PCIe card will fit into a slot of its size or bigger, but not into a smaller PCIe slot The number of lanes actually connected