Sorry for my bad english,
I just installed Windows 7 Ultimate 64 bits, at home desktop, upgraded all my drivers (including bios, monitor drivers...)...
Then I bought, Dragon Age in Steam, and started playing, after 5 minutes the game became the most laggy thing in the world. Ok, I thought it was something with dragon age. Installed GTA IV, installed the patch, same thing, after about 5 -10 minutes the game starts to lag.
After searching a lot of foruns in the net, i realized that everybody seems to have problems with gaming in Windows 7, or the game crashes, or graphics problems.
I tried compatibility mode - same
Tried tweaking nvidia options - same
Tried tweaking games options - same
Installed more three games to test, all have the same problem.
GeForce GTX 250
Thank you all...