I've heard rumors of a "685", a flagship card faster than the 680 that won't necessarily be part of the 700 series. There's no firm backing to the rumors, though.
You'd still definitely be fine on an 850W, if not a 750W, as I said.
I've heard that 685 (780, not 680) will have power requirement of 250w but if we overclock both GPU's and the CPU what kind of power supply would i need?
I've heard rumors of a "685", a flagship card faster than the 680 that won't necessarily be part of the 700 series. There's no firm backing to the rumors, though.
You'd still definitely be fine on an 850W, if not a 750W, as I said.