What is the PCIe generation of the NZXT PCIe Riser Cable and Vertical GPU Mounting Kit?

The PCIe Riser Cable, as well as the cable included with the Vertical GPU Mounting Kit is PCIe Gen 4.0 x16 compatible.  This cable is also backwards compatible with previous generation PCIe slots and devices, but will be limited to the speed of the host slot.

The riser cable is also compatible with PCIe Gen 5 x16 slots, however it will be limited to Gen 4.0 x16 speeds.