slot pcie x16 ✓ Replacing PCIe x16 slot

The Matrox C680 full-height, PCIe x16 video card supports up to six displays or projectors with a maximum resolution of 4096 x 2160 C900 PCIe x16 graphic card slot pcie x16,PCIEX16E-Q4S is PCIe x16 edge connector to four PCIe x16 Slot Interconnect Cabling solution

By you sticking a UAD-2 card into the second slot, the motherboard detects this and automatically throttles the first slot down to 8x assuming you have stuck in slot pcie x16,I see many mobos have two PCI-E x16 slots, where the primary PCI-E x16 is for my gpu, but 2nd one only supports up to x4 or something

slot pcie x16,‌PCIe X16 Golden Edge to PCIe X16 Slot Adapter Features : PCIe x16 card edge PCIe x16 slot PCIe Gen 3 16 lanes signals of PCIe designated 4 Layer PCB