At home I use sun power supply 450 watts brand I've used about a year or more. My computer has Gigabyte motherboard, AMD Athlon XP processor 3000 +, 3 pieces of DDR memory, 2 optical drives, VGA ATI Radeon 9800Pro, 1 PATA drive and 1 SATA hard disk and 4 internal fan 4. The problems that I experienced is that my current hard drive is often dropped. Like not detected by the system. VGA is also sometimes screw up when running heavy games. Well I wanted to ask is, if there is something wrong with my power supply? His lack of power or because I am a passive power supply (PFC)? Please enlightenment. Answer: The most likely happen is the power supply is less qualified. Economical power supply as the sun has a very low efficiency. If written capable of delivering 450 watts of power, but usually less than that, and no real power or the results that can be output 450 watts. For example, if the power supply could spend up to 400 watts of power, with low efficiency, economical power su