nanog mailing list archives

RE: Forcasts, why won't anyone believe them?


From: Chris Beggy <chrisb () kippona com>
Date: Tue, 16 Jan 2001 23:24:10 -0500


From: Roeland Meyer <rmeyer () mhsc com>

The assumption is wrong. A server motherboard and CPU draws the same power
regardless of what it's doing. Lap-tops and the like are different and you
actually pay extra for that design. Most circuts these days are nmos
technology. Only in cmos does the power go up with the frequency. Peripheral

Nope. Most are CMOS and the power goes up for both NMOS and CMOS 
with increasing clock frequency. 

That may not change your conclusion though.

usage, like disk drives, are also constant since the largest power draw goes
to keeping them spinning. The seek mechnics are trivial. Floppy drives and
cd-rom drives are different. But, most servers do not keep those spinning
constantly. Ergo, for all intents and purposes, servers are a constant power
draw. They can be rated.

Chris



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