Re: Admittedly off-topic: _Under_clocking and VCore

On Wed, 17 Jun 2009 12:15:49 +0000, Hans-Joachim Zierke wrote:

> I want to use an Athlon XP 1500+ for a 24/7 system. Unfortunately, the
> CPU needlessly doubles as a room heater.
>
> So my idea is, to underclock from 1333 to 1064 (or some similar figure).
> Now the question: How do I calculate VCore for the lower frequency? 1333
> -> 1064
> 1.75 -> 1.??
>
Pretty much trial and error. However, if the default is 1.75, then you've
got an old Palomino core cpu that runs very hot compared to the newer
Tbred B cores. Look for a cpu with cpu id 781 (Tbred B core). I've run
them fanless at low speeds with voltage as low 1.3v iirc.




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On Wed, 17 Jun 2009 18:37:34 +0000, Hans-Joachim Zierke wrote:

> Yeah, I know, see above. Good reason for underclocking. I thought that
> with 20% MHz less, even a Palomino should behave. Wrong? I could go to
> 900 without performance problems.

Well, you can certainly lower the speed and vcore and it will help. I
would think you couold probably lower the voltage to at least 1.5v and
still get it to run reliably at 1Ghz. That should lower the temps
considerably. But like I said, about all you can do is experiment with it
and see how low you can get it.

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