Will this x4 PCIe card fit in the x16 slot of a Dell PowerEdge r310?

List of Motherboards with 4 PCI-Express x16 Slots: ASUS Pro WS TRX50-SAGE WIFI, GIGABYTE A620M C, GIGABYTE B650M C V2, ASUS Prime B760M-A AX, GIGABYTE B760M

I thought PCIe was superceding PCIX But I have 2 PCIe x 1 slots on my motherboard, 3 ordinary PCI slots and one which is

pcie slot cover 1 Answer 1 Your assumption is correct This would be a slot with only four PCIe lanes connected, but it can fit a 16-lane card This is pretty

pcie x4 in x16 slot PCIe slots come in different physical configurations: x1, x4, x8, x16, x32 The number after the x tells you how many lanes (how data travels to