I just freaked myself out by reading an article on power supply sizing and have a question.
I was told the Athlon or Pentium run on the 12V rail and that they pull between 7 and 9 amps. I added that to my HD's two 7200 RPM WD 120 Special edition and two IBM 15,000 RPM SCSI. They are all on all the time. I added a DVD and a DVD-R drive, fans and etc. and came up with the astonishing result that my system needs about 238 watts on the 12 volt rail just to turn on and function.
Now 238 watts divided by 12 volts equals 19.833 Amps on my 12 volt rail.
The reason for wigging out is because I am and have been running a Herolchi 475 watt PSU for about six months and it has been stable. On the side of the PSU it says it is rated for 15 Amps on the 12 volt rail.
I know mathmatically that I am pulling at least 19 Amps continuously from this PSU on the 12v rail.
So my question is: Am I in danger of burning out any minute? Is the total wattage of the PSU cumulative or what? I am not panicing because there haven't been any problems. But I like to be proactive when it comes to my beloved computer.
Just so I don't have to type it latter I am running:
Athlon XP 2800+ Barton
Asus A7N8X Rev 2.0
SATA RAID Dual Special edition WD HD's
Adaptec 2100S (128MB on board) SCSI Raid with IBM 15000 RPM HD's
ATI 9700 Pro
1024MB Corsair 3500 Dimms 22251T 4bank
Liteon 32X CD Burner
Pioneer A05 DVD Burner