How To Check PCIe Version of Slot and Motherboard

you will need at least a pcie x16 or pcie x8 to prevent bottlenecks a pcie x1 slot will most definitely reduce PPD from the card on it

Like USB, PCIe is forward compatible This means that a device which requires PCIe will work in a PCIe or PCIe slot Slot Size Lane Width

pcie 8x slot Even if you put an x1 card in the x4 slot, you will lose the x1 slots Many boards share PCI-e lanes with several slots and even services such

pcie 4 ssd in pcie 3 slot For example, an x1 slot can have only one transfer lane used by the x1 card inserted into the slot; x2, x4, x8, and x16 slots are also available