am5 motherboard with at least 4 x16 pcie slots for

That mboard only supports PCIe 1, gtx960 is pcie but will work in the slot, however this means a slower data transfer rate = you wont be

If it seems like you never have enough USB ports for your devices, then internal expansion via an open PCI Express x16 slot may be an option You can add

pcie slot qrelease 20mm Spaced Slots:The 20mm slot spacing allows for easy installation and compatibility with PCIE extension cable adapters Computer Expansion SlotU 2 PciePCIe

pcie slot cover Description Features Downloads The OSS-BP-580 expansion backplane provides five PCIe x16 downstream expansion slots for the latest PCIe add-in cards