Can i use an AMD graphics card purely to encode my stream, whilst gaming through my current Nvidia card?

[ChrisAkira]

So, to elaborate slightly, i currently game through my GTX1070 (8gb), and either encode the stream through that same card, or through my PCI capture card (Avermedia c985). However i have an old Radeon HD6870 (1gb) that i could potentially plug in and use to encode the stream instead...... or if i can hunt it down, i might even have my old GTX970 (4gb) buried somewhere...

Is this something that is A- achievable, and B- worth the time/effort compared to using the c985 card? I wouldn't be using the 6870 for any gaming, it would purely be plugged in and working the stream for OBS...

Thoughts/Comments/Suggestions?

 

[koala]

Use nvenc with your gtx 1070 and physically remove any other GPU. Don't use a capture device to capture video from the same PC. Use a capture device only if you need to capture a console. This is the most efficient setup. Other setups, other/more GPUs don't help - they result in less performance and lower quality, actually.