I have a probably really weak Celeron G1610 (2 cores, 2 threads, 2.6ghz, 22nm and about 2500 passmark points) , 8gb RAM and I have a also kind of weak Radeon 7730 vtx3d 2gb ddr3.
I usually get about 27-35 fps in the city and around 40-50 in the desert when using normal textures, high shaders, no antialiasing, 4x anisotropic, high quality water and most other stuff is around low/normal. The resolution is 1280x1024 or something like that.
All in all it's obviously not a i7 + Titan x experience, but it's playable, I rarely actually encounter any fps drops bellow 24, I previously had 4gb RAM and had stutters all the time, but not anymore.
So, yesterday I tried pumping up the texture settings to high and...fps is almost the same, however I did experience something else, the controls were unresponsive. I want the car to go just a little to the left and he makes a whole U-turn, I want to go a little in reverse and he just keeps going backwards.
I know that textures are gpu's area of work, but I suppose that the CPU also has more data to work through with high texture settings, hence the unresponsive controls issue, so will upgrading to a I5 (from a weak Celeron) fix the problem and maybe give me a few extra fps, regardless of the weak gpu?