my 780i evga just died yesterday, i had my q6600 g0 at 3.7 1.5v, it was 100% stable for a week or so..then yesterday it just rebooted...and it would reboot nonstop while turning back on..it would go into bios sometimes..which i did..set everything at stock..etc..but that didnt work..it would keep rebooting nonstop, i was able to log into windows one last time..and to my desmise..windows was showing my quad core as a dual core..lol , then the mobo restarted agian..nonstop once again..so i was like this..i got a rma ticket with newegg..im gonna send it tomorrow..and have them send me a new one.. i really dunno what happened it was so stable and working perfectly..