What are the top uses of PCIe x1 Slots?

A PCIe slot will not bottleneck the card But what CPU are you running? That might be a different story 6152021 EVGA_JacobF Nope

Ans: Yes, PCIe and PCIe are backward and forward-compatible This means that devices and components designed for PCIe can work in PCIe slots,

can you use ddr5 in ddr4 slot Actually, you can install your ssd in the _1 slot and still have your gpu run at x16 as AlderlakeRaptorlake cpu's have 20 pcie lanes or 16 pcie

can slot machines be rigged All 11th gen and 12th gen and accordingly 500600 series mainboard support PCIE , it's nothing special and not rare Also most GPUs don't