[time-nuts] Selecting server hardware (newbie question)

[Chuck Harris]

Hal Murray wrote:

>>> This is good because it's generally farther from the heat
>>> generating CPU than the CPU crystal.
> 
>> This has no hold in reality. 
> 
> It's not what I was expecting.  Several years ago, I was trying to match the 
> temperature of the crystal with the observed drift.  The data looked a lot 
> better after Dave Mills pointed out that I was measuring the temperature of 
> the wrong crystal.
>   http://www.megapathdsl.net/~hmurray/ntp/drift.gif
>   http://www.megapathdsl.net/~hmurray/ntp/drift-ex.gif
> 
> I think he said it was done that way in order to support SMP systems.  I'm 
> pretty sure it works that way on this old Linux box.  I probably jumped to 
> the conclusion that it was more common than it is.
> 
> Anybody got a list of which systems use which crystal?
> 
> 
> 
>