Originally Posted by Kranik
Another semi-off topic question for some of the experts here:
I've been overclocking and overvolting my two cards using the SKYN3T BIOS and voltage tool and during one benchmark run my system shutdown and rebooted. My guess is that between the two cards and my non-overclocked 3930K I exceeded the output of my 1000W PSU and tripped the over volt protection. Given that I plan to overclock my 3930K as well it's probably time to get a new PSU, should I shoot for 1200w or go for broke on a 1500w unit?
Don't mess around, go for the 1500w if you could. Although I think 1300w would be fine(1200w nope), You'll definitely be fine with 1500w.
I've lost lot of money going for the bare minimum amount on the psu wattage only to find it's not enough. If you had reference 780 or 780ti's, then 1000w would have been fine.
Another issue is multi rail power supplies, you could trigger a 1500w multi rail OCP psu with these classified cards. That's why I opt for single rail. 1600w single rail, not sure if there are any in the market.