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Discussion Starter #1
If all the calculators tell me 750w is what I need, I'm obviously going to get an 800w supply but once I start upping my voltages the age old Amps * Volts = Watts formula will kick in and things might not be as clear as id like them to be.

The system will be running these specs.
i7 Ivy Bridge
z77 mother board
8g x 2 low voltage RAM
2x GTX 670
SSD
1Tb standard drive
1x SATA Optical drive
Water cooled (at some point)

The concerns I am having is that dual 670's getting overclock along with the Ivy Bridge will result in A * V = W ganging up on me on three fronts of considerable power draw. dose any one have any good in sight on this?
 

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2 GTX 670's have a TDP of 170 each, so that'd be 340W for both.
Then your CPU, fans, HDD, optical drive,...
A quality 550-600W would be enough but wouldn't be too much headroom for OC'ing and wouldn't be too future proof. I'd pick a quality 750W (or 850 to be sure if you want) and you should be set.
 

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3,645 Posts
Your concerns are unfounded... that's a ~450W system at full load.... it will comfortably run on any quality 500W(or above) PSU
 
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