What is PCIe ?

PCI Express Riser Card x8 to x16 Left Slot Adapter for 1U Servers

as you have a Non G Processor that top slot should be running at full x16 speed the Top is coming Directly off the Last 4 PCI-E lanes

pciex16 slot Transfer speed: PCIe x16 to x8, 128Gbps Application: PCIe x16 graphics video card to PCIe x8 slot extension cable; Product description: ADT-Link

pcie cem slot SlimSAS 8i to PCIe x8 Slot Adapter This PCIe x8 adapter provides exceptional performance in terms of data transfer speed and reliability It is the