GTA V 50 fps requires less than 40 CPU usage.
seasonic
In story mode or GTA Online, your CPU usage is typical for your system in GTA 5.
Low cpu usage is a good thing.
Online
It's unclear what you're asking about, but I'll try to help. Could you clarify your question?
You lagging or stuttering?
Just low fps
Sure, ensure the visuals are polished with high-quality graphics so you notice it runs at 50-60 frames per second.
That means if my hardware can handle it, I'd like to see a PC doing that too.
Move the GPU to the different PCI slot