I dont know why but i`m having some lag problem with some games that of course it shouldnt happen becase of the specs of my pc. It happens some times and it happens very fast, it seems like a multiplayer lag. It happens a lot with Mafia, Need for Speed Underground 1. I tried everything from installing different video drivers, directx, changing configuration options including vertical sync to even instal a second windows and see if it would solve. Still, same problem. Its really weird cause when i bought the pc i tried to play mafia and it was perfect. Now, specially when i make a turn i have some lag problems. I even tried to overlock my machine but same problem. My specs are: Asus A8N-SLI Deluxe, Athlon 64 3500, XFX Geforce 6800 GT, Pqi Turbo Dual Channel PC3200 Low Latency, PWS Thermaltake 480W Butterfly. I hope you guys have an idea of what could be the problem cause i tried everything and it was worthless. I dont know what to do.