Here's the thing. I have a decent set-up. 8Gb(s) of RAM, and 4GB(s) of video memory (I think that's the name.) and GTA only uses like 888mb of my video mem. and around 1.3GB(s) RAM. Any reason? Normally, with and without mod menu, its around 30-15 fps
On mod menu I drop down to 4 fps it does the same thing without it like say I'm driving down the road and I'll bug so bad I can take a sip of coffee and open twitter for a bit before my game comes back into motion. Sucks.
Before I get out of my house its like 29-31 FPS but out of it, then it gets messed up.