Anyone have a similar setup? How much rad space are you using to cool them? I've seen the various "rules of thumbs" so to speak is a 120.1 for every 120/150w you're putting out. I've read the 290's can put out upwards of 400w when overclocked and the 4770k can pull 135-150w. Sounds like I'd need somewhere between 120.6 and 120.8 rad space.