david stevenson wrote:
On Monday 26 January 2004 7:30 pm, Jakub Krajcovic wrote:
Hi guys,
FIrst of all I apologize of an OT thread, but i would like to get an
estimate of how much power (in Watts) would this consume:
motherboard: QDI Legend I
processor: Celeron 333 MHz
graphics: STB Velocity 4400 (Riva TNT chipset), 16MB (agp)
sound: SB Live! player (pci)
HDD: probably WD, at max 20 GB (havent bought it yet and the
old one got
fried by a sudden power surge) optional: DVD ROM (probably one of the new
toshibas)
I've searched all my manuals, and did some (not much though, I confess)
googling, and havent found a satisfactory answer.. I'm asking, because I
decided to put this into my car and I need to know what type of inverter I
should buy.
Hmmm, I think you will find the actual power used is not the important figure.
Power on peak will come in to it, but PC power supplies are expecting a sine
wave they can pull large pulses of power from and inverters put out a current
limited square wave, they do not work well together. Vastly oversizing may be
OK, but I have not tried it.
David
--
[EMAIL PROTECTED] mailing list
What makes you think that the computer power-supply is expecting a sine
wave? The current is rectified and filtered then goes through switcher
circuit to provide the various voltages for your computer. The square
wave might normally create some noise, but in the power-supply used in
computers, the filters seem to take care of it nicely. However, Why
would you even bother with the expense of an inverter when for about the
same money you can get a switcher that would replace the existing
power-supply and run off of a secondary battery. Less heat to worry
about and less to trouble-shoot if anything goes wrong. Now that I've
just wasted all this band-width, why would you want to? There are all
kinds of low-power mb/cpu combo's on the market that are not quite the
power-hogs that desk-tops are? Some of these mobile cpu offerings will
do everything bu park your car for you. Using a desk-top as a mobile
computer would be sucking 20 to 30 amps from your vehicle (might even be
more) I think you are very close to 200 to 250 watts consumption on a
desktop running Cel 333 and since power supplies are not 100% efficient,
that still (@100% ef) translate to over 20 amps (thats not including
your monitor)
--
Ted Ozolins(VE7TVO)
Westbank, B. C
--
[EMAIL PROTECTED] mailing list
