I just voltmodded to my XFX 7900 GT to 1.4V using Kynar wire, and using atitool i get 665 GPU and 895 Mem ive knocked them down to 660 and 890 there was no artifacts at the higher setting but thought id knock it down a bit. The card with my zalman 900 idles at about 44 and maxs out about 61, how much hotter do you think is gonna be safe ?