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Subject: Re: Differences between Opteron and Athlon 64

Author: Michel Langeveld

Date: 21:21:11 12/04/03

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On December 03, 2003 at 23:22:16, Russell Reagan wrote:

>On December 03, 2003 at 20:15:26, K. Burcham wrote:
>
>>
>>the Athlon 64 FX-51 uses a 940-pin package, similar to AMD's Opteron, while the
>>Athlon 64 3200+ uses a 754-pin package.  The Athlon 64 FX-51 also has a memory
>>controller that is twice as "wide" as the 3200+; 128-bits vs. 64-bits
>>respectively.  The Athlon 64 FX-51 also requires registered memory to function,
>>whereas the Athlon 64 3200+ can use standard unbuffered DDR memory.
>>
>>the FX-51 is housed is ceramic packaging material, ala the Thunderbird.  The
>>Athlon 64 3200+ is using organic packaging like the current generation of Athlon
>>XPs.
>>
>>
>>http://www.hothardware.com/hh_files/CCAM/a64fx_51_launch.shtml
>
>That is a good article, and it answers some of the questions, but it is still
>unclear which processor would be best for different circumstances. It doesn't
>really address Opteron vs. Athlon 64. We have:
>
>Opteron for servers
>Opteron for desktops
>Athlon 64
>Athlon 64 FX
>
>It seems clear that the Athlon 64 FX is better than the Athlon 64, but whether
>or not it is worth the significant price increase, I don't know (it doesn't seem
>THAT much better). Also, the main improvements seem to be memory bandwidth,
>which hasn't been very important for chess programs.
>
>Some of the lower end Opterons can be had pretty cheap, if someone wanted to
>just test one out. I don't know if it would be better to get a cheap one to play
>with, to get an expensive one now, or to put the whole thing off and wait until
>newer ones are available. Surely 2.2 GHz is not as high as they will go.

Take a look at specint.org (There is a test with Crafty)

Here quick some numbers:

AMD Opteron 148          2,0Ghz    :       1506
AMD Opteron 246          2,0Ghz    :       1371
AMD Athlon (TM) 64 3200+ 2,0Ghz    : 73.0  1370
AMD Opteron 146          2,0Ghz    :       1369
AMD Opteron 144          1,8Ghz    :       1224
AMD Opteron 142          1,8Ghz    :       1094
AMD Opteron 140          1,8Ghz    :        957





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