The latest PCIe 4.0 supports transfer rates of 16GT/s bit rate. While providing double the bandwidth of PCIe 3.0, the Gen 4.0 riser cable remains backward compatible with a maximum transfer speed, offers great performance, and shows off the GPU at a great new angle.
 
Model: PW-PCI-420
Color: Black
PCIe Riser Cable: Gen 4.0Cable
Length: 200mm

https://lian-li.com/product/pci-e-4-0-x16-riser-cable/