PCI-E 20 Slot 4U System

PCIe slots come in different sizes, with the most common being PCIe x1, PCIe x4, PCIe x8, and PCIe x16, which indicate the number of lanes

16x is physical slot size, that is capable of wiring up to 16 PCIe lanes, but on your motherboard that slot has only 4 lanes connected to it

pcie slot splitter PCI-E X16 Slots can run in x1, x4 , x8 and x16 modes so you can install a x1 card in a x16 slot without worries of shorting anything as long as

pcie 50 x16 slot features · 20 slots for full-size PCI-E cards x16 PCI-E Gen 3; Auxiliary power cable for up to 400W · Active cooling with three high performance 120mm fans · Dual