Where shall I install the PCIe card?

pcie x1 in x16 slot   Dan pcie 4 slot

however both x1 cards work in desktop's pci express x16 slots, plus, a x16 AMD GPU card works on unmatched board as well both x1 cards are wifi

Other PCIE slots are x16 physically, but they all operate as x1 electrically With that said, if I put my HBA to the x1 slot, what Is the card installed in the top pci-e x16 slot? Do you have any other hardware plugged into other pci-e slots in the motherboard?

rapunzel slot A PCIe x1 slot has one lane and can move data at one bit per cycle Most GPUs require a PCIe x16 slot to operate at their full potential  IF your mobo is out of warranty just cut the back part off the Pci-E X1 slot and the card will fit without seriously messing up the mobo or