Re: AXi board and 400MHz CPU?

From: WilliamREMOVEWyattTHIS (REMOVEwyattTHIS_at_cfa.harvard.edu)
Date: 12/29/03 

Date: Mon, 29 Dec 2003 10:29:09 -0500

> Probably because of cooling restrictions. Ultra 5's are fairly compact
> enclosures compared to the tower version (ie. the Ultra 10's).
>
> 440 Mhz CPU's definitely need to have a fan cooling the heatsink directly.
> There might not be room for one in the Ultra 5 enclosure.
>

What is the scaling law for CPU speed vs. temperature? The 10% difference
from 400 to 440 would be almost 50% in heat if it is a n**4 scaling. 

-- 
Bill Wyatt (REMOVEwyattTHIS@cfa.harvard.edu) "remove this" for email
    Smithsonian Astrophysical Observatory  (Cambridge, MA, USA)