Athlon vs. PIII

Simen Thoresen simen-tt at
Tue Feb 20 08:17:14 PST 2001

>: ole at pgs1-11:g98-work; g98/g98
>model name      : Pentium III (Coppermine)
>stepping        : 3
>cpu MHz         : 799.665
>cache size      : 256 KB
>: ole at pc-10:g98-work; g98/g98
>model name      : AMD Athlon(tm) Processor
>stepping        : 1
>cpu MHz         : 807.203
>cache size      : 64 KB

Um, Might your Athlon actually be a Duron?
In that case, you are comparing a Celeron-like CPU with a PIII, which hardly is fair.

>Athlon run PIII code almost as good as PIII. However, the cache
>size for Athlon is not 512k as PII but 64k.

The L2 cache size for the Athlon (Thunderbird) is 256K, just like the PIII (Coppermine).
The L2 cache size for the Duron is 64K, while the comparable Celeron has a 128K L2 cache.
All AMD K7s have a 128K L1 cache, while all P2 and PIII chips have a 32K L1 cache.

Some tests show the Duron almost outperforming the Coppermine at the same speed, and that might be what you are seeing here.

-Simen (one floor down and to the left of you)
Simen Thoresen, Beowulf-cleaner and random artist - close and personal.

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