Nexus99,

I'm going with a Corsair H100 for cooling (found at newegg or whichever getting place you use).  For PSU I'm using Dell Z750P units (http://www.ebay.com/itm/OEM-Dell-PowerEdge-2950-Z750P-00-RX833-0RX833-7001072-Y000-Server-Power-Supply-/251533148025?pt=PCA_UPS&hash=item3a908b3f79) coupled with a gekkoscience Dell PSU breakout board (i.e. sidehack's breakout board http://www.gekkoscience.com/products/D750_supply_breakout_board.html).  Right now I have a couple of those pulling between 920W and 950W at the wall.  From that you can tell that over committing the PSU is WAY possible *without* much chance of the magic smoke coming out.  On another note, does anyone know if the HashFast Minepeon image work as the miner for these boards?  Hope this helps.

H@shKraker