i need soem serious help i am not able to play many of the games...... please help .
It certainly has the processing power, but it will all come down to what the power supply is like in it. Better cards need a lot more power, so if you did decide to get a good graphics card then its possible that you will have to get a better power supply.
Something like this would be able to handle a good card. Its also important to get a good branded power supply as they power your whole system nd you don't want it giving you variable power.