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Subject: Re: Memory benchmark comparison DDR333 vs RDRAM PC1066 !

Author: Robert Hyatt

Date: 19:19:16 12/01/02

Go up one level in this thread


On December 01, 2002 at 12:57:51, Aaron Gordon wrote:

>On December 01, 2002 at 12:28:38, Robert Hyatt wrote:
>
>>On December 01, 2002 at 05:03:00, Jorge Pichard wrote:
>>
>>>Also a comparison of the new AMD XP 2600+ Vs Intel P4 2.53 Ghz !
>>>
>>>http://www17.tomshardware.com/cpu/02q3/020821/athlonxp-04.html
>>
>>
>>That just highlights what others have said before.  AMD has a memory
>>bottleneck that is hurting them significantly in the war with Intel...
>
>Hyatt, it's not nearly as bad as you think. It happens I have a KT333 chipset on
>an Epox 8K5A2. I'm running "Turbo" settings in the bios (but running CL2.5
>instead of CL2(cl2=faster)) and I'm getting 2.5gb/s.

So?  That is about 1/4 what the PIV xeon can do.  Go to tom's hardware page
and you'll find some interesting comparisons...




>
>This just proves once again Tom is a bad reviewer. There's already proof out he
>faked a Pentium4 review and I have proof he hinders Athlons (by setting their
>bios settings to the absolute lowest setting). The KT333 set to "turbo" has an
>efficiency of 94%, this means out of 2.7GB/s max theoretical bandwidth at
>166fsb(333DDR) it does 2538MB/s. Since mine is CL2.5 I'm only running 90%
>efficiency (2430mb/s). With Nforce2 boards and running 200+ fsb you can get over
>3gb/s on an Athlon easily. Same with the Epox 8K9A2.


Again, that is _still_ slow compared to the PIV xeon numbers with (say) the
E7501 chipset...



>
>Tom however is managing a horrible 74%. You can do better than this even setting
>the settings to 'normal'. He has disabled other options to get the benchmarks
>THAT low. 26% below regular 166fsb(333DDR) scores is pretty bad.
>Even your average KT266a/333/400 board at 133fsb gets about 2gb/s.
>
>About the faked review he did.. it's the "Hot contraband P4-3.6GHz". He used a
>Pentium4 2GHz CPU and cut&pasted some of the 3's to make it look like a 3.3GHz
>P4. The picture is STILL on his page. Just go look at that article and save the
>large P4 picture. Go into an image editing program and go near the bottom where
>it says "80531PC3.3G0K". Drag a selection box around the second three in that
>line and copy it, invert the colors and then drag that over the other three. You
>will see a black box where the colors match EXACTLY. This was a cut & paste job.
>
>Tom isn't the only corrupt reviewer, either.


I'm not going to debate that.  Tom's hardware isn't the only place that is
doing these measurements.  There are some well-known academics that are
interested in various benchmarks like streams, linpack, etc...




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