This is nearly my system, with the exception of a 650D case (which is way big enough), a P9X79-Deluxe board, an H100i cooler and only one GTX670 GPU at present. I did an analysis on airflow some time ago and posted it on the Corsair forums: Push Hot Air In or Out? At the time, Corsair's standard ...

Read a thread on this in the Licensed Users LightWave Plugin Forum and, seeing as how I cannot post a response in there yet, thought I would offer one here. If the Mods want to move it in there for continuity, that's fine.

The question is on how large a PSU would be needed for a GTX690 and a GTX670 ...