Virginia Tech PowerMac G5 Cluster Photos

Richard Walsh rbw at
Mon Sep 22 10:41:39 EDT 2003

On Sun Sep 21 00:21:03, Dean Johnson wrote:

>On Sat, 2003-09-20 at 19:25, Greg Lindahl wrote:
>> On Sat, Sep 20, 2003 at 01:10:12PM -0400, Jeffrey B. Layton wrote:
>> >     * 2+ million BTUs of cooling capacity using Liebert's extremedensity
>> >       cooling (rack mounted cooling via liquid refrigerant)
>> >           o traditional methods [fans] would have produced windspeeds of
>> >             60+ MPH
>> This is kind of weird, given that their energy density isn't that
>> high: 2 cpus in 4U. I've seen machine rooms which have 8 times the
>> energy density.
>Their energy density is trivial. I can't recall how many watts they are,
>but my guess is much less than even old celerons. I wouldn't be
>surprised if each of those whole machines sucks less juice than a single
>itanic cpu. Wasn't the G4 design spec something like 24 watts.

The "estimated" power consumption on for the chip is 42W at 1.8 GHz 
and 1.3v, or 19W at 1.2.GHz and 1.1v according to an IBM PowerPC 970
overview I have.


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