How to calculate the Power (PSU) A PC needs ?

  • Thread starter Thread starter dogan cibiceli
  • Start date Start date
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dogan cibiceli

I have an Athlon XP 2500 with two hard drives (each ATA 133), CD-RW and
GeForce4 card with Creative sound card. Recently one of my hard drives went
caput. It has the same symptoms as the old one which I switched to a new
motherboard/case/PSU afterwards. I am suspecting either the mobo or the
power unit is flaky. I have a 420W power unit on it. I would like to go get
a new Enermax around 360W. Will that be one for my system ? How do u calc.
how much power u need ?
 
Got this somewhere on the web and had it saved:
DEVICE WATTS
video card 50
pci 10
nic 4
floppy 5
cd-rom/RW/dvd 25
hard drive 25
fan 3
mobo 40
ram - 128 MB 8
cpu 70
 
dogan cibiceli said:
I have an Athlon XP 2500 with two hard drives (each ATA 133), CD-RW and
GeForce4 card with Creative sound card. Recently one of my hard drives went
caput. It has the same symptoms as the old one which I switched to a new
motherboard/case/PSU afterwards. I am suspecting either the mobo or the
power unit is flaky. I have a 420W power unit on it. I would like to go get
a new Enermax around 360W. Will that be one for my system ? How do u calc.
how much power u need ?
Click to expand...

Take a look at this http://www.jscustompcs.com/power_supply/

Hank
 
dogan cibiceli said:
I have an Athlon XP 2500 with two hard drives (each ATA 133), CD-RW and
GeForce4 card with Creative sound card. Recently one of my hard drives went
caput. It has the same symptoms as the old one which I switched to a new
motherboard/case/PSU afterwards. I am suspecting either the mobo or the
power unit is flaky. I have a 420W power unit on it. I would like to go get
a new Enermax around 360W. Will that be one for my system ? How do u calc.
how much power u need ?
Click to expand...

http://takaman.jp has a power needs calculator that seems to be pretty
good and not give grossly high estimates. 360W should be far more
than enough, but power ratings vary a lot in accuracy, so a generic
360W might not manage even 300W, while www.tomshardware.com said that
a 350W Enermax (EV365-xxx) topped out at 389W, the same as a 300W
Fortron/Sparkle. One 350W Fortron/Sparkle maxed at 454W. Buy quality
above raw watt ratings. Enermax (also CaseMart, Wavesonic) is good,
but better are Antec SmartPower (or Channel Well "A" series, i.e.,
CWT-430-ADP, CWT-480-AD) and Fortron/Sparkle (also Powertech - but not
Powertek, PowerQ, Hi-Q, Aopen, Trend). NewEgg.com is really cheap on
the latter.
 
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