OCZ ProXStream 1000W Power Supply
 

"The unit is amazingly small for a 1000W power supply; as similar units form other companies typically require extended depth designs, which can require larger cases in order to be mounted properly. The OCZ unit, on the other hand, has the depth of a standard ATX power supply, meaning it can be mounted in nearly every standard ATX chassis on the market today.

http://www.hothardware.com/viewartic...?articleid=933