Recommend me OC for gtx660 and i5 3570

All with standard cooling wich was included with the PC.
What should i overclock it to? Its a new pc...but i am going to play far cry 3 on a 2560x1440p monitor and the max settings would be cool. (20+ fps is playable imo)

OK, the cpu can be overclocked to about 4.2 without more voltage, go into bios and increase the multiplier by one, reboot and do 5-10mins prime 95, repeat untill pc wont boot. no need to check temperatures yet as no voltages have been increased. if you want more, bump voltage up a bit and increase multiplier again, check temps and do prime 95 10-15 mins, repeat untill the pc wont boot, the temps are too high or u thinks its enough.

I think the gtx 660 will be fine but as i am no expert at overclocking gpu i suggest you google it

If your 660 is anything like mine then it doesn't like overclocking much. The Memory will overclock great, I can run a + offset of 600mhz all day long, but the clock offset is a waste of time, mine crashes with only + 12mhz. The biggest problem is the locked voltage, at 1.175v maximum its holding things back for sure.

I don't know if you have the 660 or the 660ti, if you have the 660 then it might overclock better than my 660ti, all models vary and brands too, I think the EVGA ones seem to be the worst for overclocking. Msi ones seem to be a lot better.

Edit: Just have a play round with it, you won't kill it due to the locked voltage and if it gets too hot it will just downclock. If you Overclock too high the drivers will just crash and you know you went to far, back down a bit and try again. Use maybe Heaven benchmark to test for stability, usually if it will pass that it should be stable for gaming.

Paul.

paul... What do you think of the info on my post. Is it correct?

Can you give us a better idea of exactly what components you have? Brand, model, etc?