1024x768.. because of the vram., fx 4600 was a high end card back in 2007-2008. It can still run games pretty good but it's limited by its v.ram.. I run GTA V on 1024x768, FXAA on, All settings maxed out except grass quality on normal, msaa off, reflection msaa off. I get 20-27 fps.. pretty playable with good graphics. Advanced settings all off.. my gpu can run it but vram is limiting it that's why I keep advanced settings off.