Mailinglist Archive: opensuse (3572 mails)

[Dave Plater <dave.plater@xxxxxxxxxxx>]

Per Jessen wrote:
> Carlos E. R. wrote:
>
>   
> > > What I think is worth noting here - a somewhat highend system like
> > > this still uses barely 250W at _full_ load.
> > >       
> > Still, I don't know if those new measurement gadgets can be trusted. I
> > mean I don't know, not that they are bad.
> >     
>
> I don't know if they can be trusted, but I can't really think of a
> reason not to.  I guess I could find a well-defined load (a large
> wattage resistor for instance) to check it.  
>
>   
> > The important thing is the power needed at each of the internal DC
> > lines. Some one said that the MB nowdays uses power from the 12 V
> > line, and also the video card uses it (I don't know what for). Plus
> > the fans, the high speed drives... sum all of that. If it close to 10
> > Amps, and the 350W unit can supply only 10 A (for instance), then you
> > really need a higher wattage power supply: not because you need that
> > so much power, but because one of the lines uses much more power.
> >     
>
> Or a powersupply with a higher output rating for the 12V line.  But
> you're right, point taken.
>
>   
> > Ie, the peak power during spin up is 2.8 Amps on the 12V line, 0.8A
> > avg maximum during seeks. The power supply must be able to handle
> > that, and if it is true the MB uses also that line, there will be
> > problems.
> >     
>
> Well, although the measurement device cannot measure peaks, the harddisk
> spin-up time is 3-4-5 seconds or so, so I think I would have seen any
> excess load.  During startup, the machine used up to 175W. 
>
>
>
> /Per Jessen, Zürich
>
>   
Going by your temperature info the machine bombs due to a temperature
spike when all cores are working hard. Nothing wrong with PSU.
Dave


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