Question / Help What is this option? (Output -> GPU)

[nechaa]

Short Question: What is this option? Found under Output -> Advanced -> GPU

Should I change this if I have a weak CPU?

 

[Gol D. Ace]

This is the GPU NVENC will run on. If you have multiple GPUs you could change which one is doing the Encoding.
If you have only one card leave this at 0.