If I overclock my Abit x800xt any more than 30Mhz(core), when im playing CS:S, the whole system will just freeze, and all I can do is power it off. I managed to get the ram running stable at 560. I have very good air cooling in my case, VPU runs 28-31C idle and 45-51C under heavy load. Any idea why its freezing? Shouldn't I be able to push this card harder given these temps? Do i need to up the voltage to my vpu? I OC using ATI Tool. I tried omega drivers, but they just made everything much slower. Help plz?