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estimating power consumption, please help

Z

zackboll

Limp Gawd
Joined
Oct 28, 2004
Messages
470
Hello, im trying to estimate the amps im going to draw on the 3.3, 5 and 12 volt lines for a small form factor system im building so I can choose an appropiate DC12Volt- DC power supply.

here are the components
PC Chips flex atx Skt 370
P3 1.4 Ghz Taulatin Core
1 GB stick of PC2100 DDR
XFX FX5200 low profile pci video card
Audiotrak 5.1 24bit low profile pci sound card
Samsung 5400rpm 2.5 laptop hard drive

This is everything that will run off the power supply. I am not sure how much this system will consume, but I do know that it is low, probaly under 100 watts.

I anyone could help me estimate the amp load on the 3.3, 5, and 12 volt lines, that would be greatly appreciated. Im not looking for exact numbers, a rough ball park number would be greatly helpful. Not looking for answers with just a combined wattage stating, but rather estimates on the amps for each of the voltage lines.

Since this is an older socket 370 system, ive heard that the 3.3 and 5 volt lines are utilized more, and not as much stress is put on the 12 volt line. I really dont know what im talking about though, someone please help.

thanks,
Zack
 
oh and probaly like 2 80mm fans, so like 2-4 watts more on the 12 volt line im guessing?

Zack
 
larrymoencurly said:
http://takaman.jp has an estimator that gives amp numbers for the individual voltage rails, but its +3.3V amp estimates can be way too low, like by a factor of 1-2.
Click to expand...

But few modern items use the 3.3v.......you would be hard pressed to overload the 3.3v on a good PSU.
 
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