dual vs single core opteron 100's

[JoaoBR]

On Saturday 28 January 2006 11:40, O. Hartmann wrote:
> >
> > If I am not wrong there is actual only the X2-4800 and 4400 with 2x1MB
> > cache, all others are having max 512K
>
> We were talking about comparable Athlon64/Opterons for socket 939.
>
> > The Opterons are having 2MB of cache, not 2x1
>
> No, that's wrong. Dual-core 1XX Opterons do have two times 1MB 2nd level
> cache for each core, not a unified 2MB cache!
>

right, well, I didn't read with attention ... sincerly I was not even aware of 
existing socket 939 opterons so all my opteron opinions were not related with 
this ones

I just reread the processor comparism query on amd's site where the dual 
opterons are returned with 2MB cache 
http://www.amdcompare.com/us-en/opteron/Default.aspx#grid

but on the data sheet they are as 1MB per core, so 2x1Mb
http://www.amd.com/us-en/Processors/ProductInformation/0,,30_118_8796_9240,00.html

I guess you are right here, make sense and I do not care so much either ;)

anyway, amd should be able to give exact info on all papers the publish

> All right, talking about scientific calculations, I would prefer a real
> dual chip plus dual core Opteron 2xx system due to the fact, memory
> bandwith is much more efficient when using NUMA architecture. But in my
> opinion, comparin dual chip and dual core Opterons (and their Athlon64
> counterparts) is comparing cherries and pineapples ...
>

sure, absolutly, but often on smaller or low bandwidth server the difference 
is not even appearing, for the client I mean, I have no idea how this is on 
PCs or Workstations

but money is a strong point when you get the same quantity of "cherries" at 
the end, so the comparism is it worth to talk about and find out the limits


João







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