Ok, my PC is only about 6 months old, custom built, and it runs this game like garbage. I've got it for console and console runs it flawlessly. I know it's a port to PC, but it still doesn't change the fact that for my specs it should be running fine:
AMD Phenom II x6 (3.3GHz)
8gb DDR3 1866 RAM
Radeon 6870 1gb
2tb 7200 WD
I tried using 126.96.36.199, it lags a lot worse than 188.8.131.52, which I can run everything on high settings fairly fine, but the draw distance is very low and everything looks like pure crap.
I tried using various ENB visual packs to improve the graphics quality, with lag of course.
What's the key to getting this game optimized?