[ringzero] Re: general hardware question

On Wednesday, January 17, 2007 11:27 PM GMT,
ed <ed@xxxxxxx> wrote:

> one of the results [http://www.redstore.com/VIAMOT003] that i looked
> at must be wrong, unless my maths is up the creek, but i am half
> asleep now anyways, quoting 13w idle and 18w loaded:

Those numberes are for the CPU alone, not the entire system.

> 18 / 240 = amps, 0.05... is that right? most computers use about
> 2.2amps, generally, around the office. seems like a huge improvement,
> or maybe i just underestimate the power consumption of a hard disk and
> video card.

Your calculations are not right. You need to account for the inefficiency of 
the power supply and power regulators circuits. For example, a good power 
supply runs at around 70% efficiency, with the best running around 80%. Its 
about the same for power regulators on your motherboard.

Today's average desktop consumes around 250-300W of power. Of that, only 
60-70W account for your processor. The reminder of that goes to power your 
RAM, motherboard, drives, monitor, and whatever peropherals you might have.

Even if you move to a VIA C7 (which is slower than what your A64 when its 
throttled down), you won't see some big improvements in power consumption 
from the entire system, since you seem to be planning on reusing the same 
components from your current setup.


Regards,
IraqiGeek
www.iraqigeek.com


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