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Subject: Re: Crafty SPEC

Author: Ryan B.

Date: 14:39:44 06/24/03

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On June 24, 2003 at 13:47:24, Tom Kerrigan wrote:

>On June 24, 2003 at 09:33:02, Lieven Clarisse wrote:
>
>>Apple and IBM team up to produce the world's most advanced processor.
>>
>>http://www.apple.com/g5/
>>
>>
>>Forged from a long-standing partnership between two companies committed to
>>innovation, the G5 drives the largest performance gain in the history of the
>>PowerPC. The 64-bit G5 speeds up to 2GHz and can address 8GB main memory.
>>See the benchmarks on the above link.
>
>The world's most advanced processor? *sigh* According to what metric?
>
>Anyway, Apple screwed up with SPEC but IBM didn't. Crafty should perform just as
>well on a 970 as on a POWER4, and scale linearly with clock speed, so we can
>extrapolate how well the new Macs will perform assuming good compilers:
>
>2GHz PPC 970 = 3.45GHz Pentium 4 = 1.76GHz Athlon XP = 1.89GHz Opteron
>
>So, really, only the P4 is in trouble, except this doesn't take hyperthreading
>into account, or the fact that the "Pentium 5" will be out shortly after these
>new Macs.
>
>There's some compiler weirdness that makes the AXP look faster than the Opteron
>but ballpark-wise, AMD is obviously doing okay vs. PPC.
>
>-Tom

Different cpus are better with different tasks.  I haven?t seen any benchmarks
that consider altivec of which is 4 to 7 times faster in some cases (not a chess
engine).  Saying that a 2GHz PPC 970 = 3.45GHz Pentium 4 = 1.76GHz Athlon XP =
1.89GHz Opteron is far too general.  For example my Duron 800 PC runs chess
programs faster than my G4 450 but my G4 450 renders images in povray faster
than the Duron.  It?s just using different tools for different jobs.

Ryan



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