Laughing heartily at the wussy 350 Watt Turbolink PSU that came with the case, I slapped in a 550 Watt, tri-fan Directron TT PSU. I laughed right up until the point the fan in the rear of the PSU ran into the fan in the top of the case! I did a little shoe-horning to get that puppy in there, but its a little snug!