thanks for that fast help guys ) i am very thankfull i will try overclocking now and i have another question :

i can play this game only on high- very high - extreme settings there is no medium option and which resolution should i use now?
Ha, High is the lowest setting (looks pretty good for a lowest setting doesn't it)

But I want to play in extreme! xD My computer should be able to handle it better than it does.

1. overclocking your card won't help, if it's OEM, probably a dell desktop, you'll end up overheating it
2. 6GB is useless, no point beyond 3GB in today's games
3. your processor is good enough

My suggestion?

- Check your PSU, if need be, upgrade to some FSP 380W or so
- Buy a new g.card, examples: HD6570, HD6670

Why those 2?

- Low power consumption
- Excellent performance

You can enjoy Crysis 2 @ 1280x1024 at near max or for that matter, MAX settings easily with a HD6670