I'm getting around half the speed from Resolve's Nvidia Encoding.
Resolve 1440p 60fps: ~240fps while encoding (4:01 for a 15min Vid)
Voukoder 1440 60fps with h264 nvidia preset: ~114fps while encoding (7:56 for a 15min Vid)
It runs stable, but I have to restart Resolve after using Voukoder, because the normal encoder wouldn't work anymore.
My GPU also only gets 50% Usage while enconding with Voukoder. Maybe I did something wrong here? Normal Resolve encoding uses around 99% GPU.
That would explain the difference in Render Speed.