GPU in PCIEX4 instead of x16

2 devices are x4 or less lanes PCIe devices Don't matter if the adapter PCB physically fits a x4x8x16 slot, the is and always will be x4

You can use a PCIe x1 card, or a PCIe x4 card in a PCIe x16 slot They work fine So if you think you are short of PCI-e slots, you may not be

can you own a slot machine But yes, a PCIe x1 card will work in x1, x4, or even a x16 slot R

candy stars 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