[Beowulf] Power consumption for opterons?
xyzzy at speakeasy.org
Wed Mar 10 09:56:49 EST 2004
On Wed, 10 Mar 2004, [big5] Andrew Wang wrote:
> --- Bill Broadley <bill at cse.ucdavis.edu>
> > I recently measured a Sunfire V20z (dual 2.2 GHz)
> > opteron, I believe it had 2 scsi disks, 4 GB ram.
> > watts VA
> > Idle 237-249 260-281
> > Pstream 1 thread 260-277 290-311
> > Pstream 2 threads 265-280 303-313
> It just looks too good to believe the numbers...
> consider that the similar performance one IA64
> processor ALONE draws over 120W.
You also have to consider that the typical computer power supply is only
around 60% to 80% efficient. If the CPU draws 120W, then that's going to be
something like 150 to 200 watts measured with a power meter, and really,
that's what matters. It makes no difference to the AC and circuit breakers if
the power is dissipated in the CPU or in the power supply.
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