Can I install a pcie x1 card in full size pcie slot?

slot PCIe is large The PCIe x1 and 16 lane PCIe x16 It is a serial bus point-to-point protocol General processors use the smallest PCI x1 slots

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

pcle x16 slot PCIE X1 SLOT PCIE X1 GOLD FINGER 20201007 U98 增加EPAD 20201007 U98 Pin17 改open SMB_CLK_RESUME1 SMB_DATA_RESUME1

pcle slot Most of dual NICs need an x4 PCIe slot The end result would look like this picture : The only doubt