Using PCI Gen3 on a PCI Gen4 graphics card significantly degrades

A quad-slot IO bracket with support for three DisplayPort and one HDMI connector is currently available for purchase on eBay It appears that

The card not only takes up 3 slots in your system, but also has rear IO mounting for all three (so 3 screws and the PCIe slot retention clip

30 jili slot game GeForce RTX 4090 GeForce RTX 4080 SUPER GeForce RTX 4080 GeForce RTX 4070 Ti 3-slot 2-slot 1-slot Length > 12in 10in

3 slot gpu NVIDIA PCIe RTX 4090, Active, PCIe , 1 GPU, Triple Width n5: Needs MCP-240-21829-0N bracket set 4x GPU: Needs to be installed to slot at 1, 2, 3, 4