[nycbug-talk] green monster server

[Alex Pilosov]

On Thu, 28 May 2009, Charles Sprickman wrote:

> 
> Is there any way to determine which power supplies will draw the least
> power when not actually loaded up?  Or is part of that 80% initiative to
> mandate that even if the box is idle and pulling like 40W the PS is not
> pulling 100W out of the wall?
Yes. Even old and crappy power supply is not likely to be <75% 
efficient even at low load.

> Just nuking this cheap-ass triple-redundant sham will surely bring me
> under 150W at idle I suspect/hope.  I can live with that power draw for
> now.
No. What will bring it down to 150W is removing second CPU. If this is a
"Nocona" generation CPU, power consumption per CPU is 120W at full load.
Prestonia is 90W.

Replacing PSU might get you from 75% efficient to 85% efficient, but that
ain't that much.

> >    cs> 8 250GB ATA drives
> >
> > 2 or 3 1TB drives instead?
> 
> Eventually.  I got this for exactly $0.  No budget beyond maybe $80 for
> the power supply.
Each drive uses ~5W at idle, 12W at load.