well i started oc'ing my 6600 today and i got it up from 290/261 to 505/312. i'd say thats a not bad oc and it can go farther since no artifacts have appeared yet. im uisng ati tool right now and im wondering how long should i keep the artifact scanner running? well im kind of worried about heat now since this video card doesnt have a temp monitor on it. so im guessing by now its getting pretty hot. so if anyone has a reccomendation on what i could use. o and ive ran the artifact scanner for about 5 min and no errors