In my computer I was using EVGA GeForce GTX 560 Ti graphic card and recently I have changed my graphic card and with EVGA GeForce GTX 680 after installing this graphic card in my computer it has started giving me annoying problem. I have Asus motherboard, 4 GB RAM, AMD phenom II processor. Earlier whenever I play GTA 4 game at that time I was getting good frame rate around 75 but with my new graphic card am getting frame rates around 30-35 which is very irritating. I have removed graphic card from my system and connected it with different PCI-e slot and then when I tried to play the game at that time I get same problem. I have opened GTA 4 game and then changed the graphic settings of the game and after doing that when I start paying GTA 4 at that time I get same problem. I have also tried playing different game in my computer but result was same. I have removed graphic card drivers with the help of driver cleaner from and then I have restarted my computer. now after doing that I have installed graphic card drivers again and then when I start playing game at that time I get same problem. Now please let me know how to fix this problem?