PSU requirement for GTX 980 and I7

Solution
The recent SBM Performance Build used a 5820K and GTX 970. Even overclocked the whole system didn't draw more than 450W at load. Now the 980 draws a little more power, but it's not a huge difference. Let's say you get this and OC the Hell out of it. I'd be surprised if the whole system used over 500W in a torture test. Figuring in a little headroom for safety I see no reason why a good 600W Seasonic, Super-Flower, or FSP unit wouldn't be up to the task. If you don't overclock it, you could possibly drop down to 550W.
The recent SBM Performance Build used a 5820K and GTX 970. Even overclocked the whole system didn't draw more than 450W at load. Now the 980 draws a little more power, but it's not a huge difference. Let's say you get this and OC the Hell out of it. I'd be surprised if the whole system used over 500W in a torture test. Figuring in a little headroom for safety I see no reason why a good 600W Seasonic, Super-Flower, or FSP unit wouldn't be up to the task. If you don't overclock it, you could possibly drop down to 550W.
 
Solution