PimpRig has reviewed the Vantec Stealth 520W PSU :
The installation you would think would be as easy as any other PSU. Well, remember that bottom fan with the grill? Next time you slide out your PSU pay attention to see how much clearance you have between the walls of the PSU case and the opening for the PSU. This PSU was just as wide as my previous one but would not go in without me taking the grill off of the fan on the underside. Then after gently sliding in the PSU so as to not move the fan inside the PSU case I screwed the fan grill back into place. Not a very simple task. Also note that the Vantec PSU is about one inch longer than my previous PSU due to the internal fans.