The bus speed you are using is strictly speaking 166MHz, the POST screen
reports 333MHz because it is a double data rate bus.  It's similar to
Pentium 4s being referred to as running on 533 or 800 MHz buses.  The actual
clock speed of these P4 buses is only 133 and 200 MHz, but they are "quad
pumped".  The Athlon XP mobiles are designated to run on a 133 MHz (or 266
MHz DDR) bus with a very high multiplier.  Since most desktop motherboards
won't be capable of a multiplier higher than 12.5, it is best to run them on
a higher speed bus with a lower multiplier on these desktop motherboards.

Glad to hear that you figured out why your processor was running so hot.
Perhaps the Barton core that they use is the reason that the old shim no
longer fits.

John Sproule

----- Original Message -----

From: "Liz & Ray Hornung" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, July 16, 2004 8:45 AM
Subject: Re: [PCBUILD] AMD 2500+M overheating resolved


> I decided to remove the old
> Thermaltake shim I've used for years off this new CPU.  Now is cruises
along at 46 Celsius working and 42 resting.
>
> Running on a Epox 8K3a board at 166 X 12, POST says FSB is 333 (although
the
> CPU says on it 266, perhaps this is a funtion of the multiplier used?)

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