X-bit Labs compares six 1000W power supplies from Cooler Master, OCZ, PC Power & Cooling, SilverStone, Tagan and Topower in their new roundup:
The same goes for power supplies. A high-wattage PSU is only a means rather than a goal. It is the means to power the PC up. So, a 1000W PSU should not be considered an achievement. It is rather an inevitable evil – nails have become so big these days that you do need a 10kg hammer to hang a picture on the wall.
A natural question, are such high-wattage PSUs really necessary? If yes, in what particular conditions? To answer that question we measured power consumption of two very advanced PC configurations..