I’ve personally run 6 encoding sessions at the same time and performance doesn’t take a hit. According to the NVENC Support Matrix, the Quadro P2000 is the cheapest card that has unrestricted simultaneous encoders that will allow you to have multiple streaming and recording tasks at the same time. If you want a better solution, go for a NVIDIA Quadro P2000 or above, because it’s pretty much made for this kind of job.This is enough for 1 channel being streamed and recorded at the same time. This will allow you at most 2 hardware encoders simultaneously. If you need a cost effective solution, go for a NVIDIA GTX 1050Ti or above.At least I know OBS and Handbrake use that technology for encoding. AMD Ryzen 5 or Ryzen 7 should do pretty well too, but I don’t know if Video Coding Engine is supported in encoding tasks.Intel Core i5 or Core i7 after second or third generation will do well, mostly because of Quick Sync Video support.Multiple cores help way more than higher clock speed. Avoid bottlenecking your GPU by having a competent CPU.That being said, my experience so far is:

Remember that streaming and recording always imply an encoding process.

This will relieve the CPU of such tasks, and in some cases, will allow you way more performance and flexibility in video rendering.

If you need to do streaming and/or recording, I urge you to look for cards that support H.264 hardware encoding.If you’re going to use the MIXER commands, this is a must. That you GPU supports at least OpenGL 4.5 or above.Having tested with various GPUs, there are two things to consider:

How to use xmedia recode gpu