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Old 5th July, 2007, 01:24 PM
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AMD Barcelona benchmarks 'Blatently deceptive'

Only a few days ago amd released some numbers regarding the barcelona's integer performace. Things looked good they were promising 20% clock for clock advantages vs kentsfield xeon's and an outright performance lead Hurrah for AMD a step in the right direction at last...

..Sadly not..

Analysts have been looking over the results with a fine tooth combe and have found some rather large gaping holes.

i)The performance lead comes from a 'simulated' performance of a 2.6GHz part, at launch they're only expecting to release 2.0GHz parts with only 2.3GHz parts coming by the end of the year maybe. No date has been set for 2.6GHz, can we trust this number is accurate ?

ii) They conveniantly forgot the 3GHz xeon part that has been shipping for a few months now, oops!

iii) Not only did they mis one chip however in the clock for clock comparison they used scores posted months ago whcih have been superceedid.
Its not as if its what intel says there parts do and amd have tested otherwise, its amd's reported numbers vs. independant verified performance figures. There is a large discrepency which eats away all of amd's claimed lead.
This is of course vs kentsfield and not its real competitor yorkfield which is known to have a 3-4% clock for clock boost over kentsfield.


For the analists take on this see http://blogs.zdnet.com/Ou/?p=567
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Old 5th July, 2007, 01:47 PM
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Hmm, ZD say:
Quote:
Originally Posted by ZDnet
On AMD’s “Barcelona” performance page, AMD shows the following fictitious and outdated information.
Yet, the graph clearly states estimated performance. It is also interesting to note that the 'performance increase' for Xeons is due to code re-tuning by Intel. Would performing the same for AMD also result in the 20% performance increase? As pointed out by one ZDnet reader:

Quote:
Wouldn't you think that Barcelona would also profit from better compiled code? The Barcelona graphs come from old simulations with old compilers.
In any case, even the "Analysts" didn't get the correct results for the dual core AMD processors. Whom is paying whom here?
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Old 5th July, 2007, 03:00 PM
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It's all swings and roundabouts! I did read some of the trackbacks about the scores not actually being verified but in actual fact just what the hardware vendors send in and also that these graphs are actually a few months old just been fairly hidden until amd made the paper launch the other day
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Old 5th July, 2007, 09:40 PM
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Say it ain't so keef!!
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Old 7th July, 2007, 06:45 PM
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Alas, poor Yorick. Aw geez, I wish AMD and Intel didn't claim horse crap performance graphs and figures. Don't they both do this from time to time?
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Old 8th July, 2007, 02:55 AM
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They do it all the time! usually though its selectively picking a benchmark which favours there cpu more.
I have read that amd have since pulled the controversial figures from there website and will in due course replace them with real bench figures from 2GHz parts (ie what they are going to launch with)

They have noted that the comparison was made some months ago when launching with 2.6GHz parts was the aim and they used the latest intel data at the time, it just took them a few months to make the reference public knowledge.

However why have they not imediatly replaced them with actual data is abit of a concern, to me it means one of a few things
a) they dont have 2GHz parts yet
b) the chip isnt performing as well as they would like and are stalling whilst they optimise the benchmark code to better suit there cpu
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