What are the top uses of PCIe x1 Slots?

What are the top uses of PCIe x1 Slots? pcie x4 in x16 slot I have recently bought a B450 mobo, and it comes with CrossFire support The thing is, only one of the PCIe slot is x16, the other one is x4 I have a pcie 4 card in pcie 3 slot Yes, it works just fine, obviously it's only work at x4 speed I would check whether the x16 slot can handle the power load of the

pcie 4 card in pcie 3 slot Yes, a PCIe x4 card will function in a PCIe x16 slot The slot will simply use 4 of the 16 lanes available, and the card will work properly

pcie x32 slot PCIe x1 x4 cards in x16 slot ✓Click here to subscribe to my YouTube channel: https: Yes any pcie xanything card will work in a x16 slot, i have a pcie x1 asus xonar stx in a 16x slot right now x4 and x8 cards will also work in