mmkmmk3 :
Christopher Shaffer :
I have a Seasonic G650 PSU that's about 2 months old. It's modular and in perfect working order. I'm about to add another GTX770 and am buying an 850W Seasonic to replace this in order to support SLI.
You can see the same model here:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151118
It's $105 new; I'd let it go for $50+shipping.
I appreciate the offer. I'll think about it but I'm moreso wanting to buy the mobo,cpu,gpu first to make sure I have enough money just in case.
Also I don't see why you'd need that much power unless you're OC'ng or have something like a 3930x and 1866+ ram along side the GPU's. It's nice to have but from memory you shouldn't need much more than 650w, otherwise.
My 3570k is oc'd to 4.5GHz, so it uses a bit more wattage.
There are a few PSU wattage calculators out there, but they all use this basic form:
http://www.thermaltake.outervision.com/Power
Based on my system usage, and compensating for future upgrades, my minimum PSU should be a Gold or Platinum-certified, 750W. Taking this into account and planning ahead, 850W is practical.
Also, with your setup, I'd strongly suggest at least a 600W PSU. A 550W, even platinum, will just barely meet the minimum requirements.
Keep in mind, even if the PSU runs 90% efficient, that's still just 495W. The 760 alone suggests a stronger PSU as the minimum recommended is 500W.