Can I use a 1x PCIe slot?

So, there is no singular PCI Express slot There are actually four sizes : PCI Express x1, PCI Express x4, PCI Express x8, and PCI Express x16

NVMe PCIe® x4 & PCIe® x2 • 1x PCIe ® Slot 2 2280 • NVMe PCIe x4 and SATA Mode 12 Smart Fan 5 + FAN STOP • 3 Fan

pcie2 slot pci e 1x slot riser,Despite the result, both teams displayed great sportsmanship and camaraderie, showcasing the true spirit of the sport

pcie 4 gpu in pcie 3 slot Yes, all PCI-E x1 cards will run in a x4, x8 and x16 slot I ran my wireless PCI-E x1 card in the 3rd x16 slot in my Maximus Extreme