I had the EXACT same symptoms Noctura had, I ran Speccy and saw my temps were running hot. I ended up replacing the cpu fan and side fan and added new thermal paste, with medium/high settings including AA and full shadows animation I run 50-60 fps constant in capital cities and pve. Havn’t tried wvwvw yet.
My specs:
Intel Q9550 2.83 Ghz
6 gb pc2 6400 (3×2)
Nvidia GTX 460
Good stuff.