dual vs single core opteron 100's

JoaoBR joao at matik.com.br
Sat Jan 28 12:50:20 PST 2006

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 

but on the data sheet they are as 1MB per core, so 2x1Mb

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


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