[gmx-users] Clovertown vs Woodcrest gromacs experiences?

Erik Lindahl lindahl at cbr.su.se
Mon Aug 27 10:41:28 CEST 2007

Agreed - although I must say that the Q6600 2.4GHz desktop single- 
socket quad-cores are looking very nice too for small clusters. You  
get a complete machine with memory and everything for ~$800, and  
apparently they overclock very well too :-)



On Aug 27, 2007, at 10:05 AM, Ansgar Esztermann wrote:

> On Fri, Aug 24, 2007 at 09:56:32AM +0200, Erik Lindahl wrote:
>> Hi,
>> Quad-core is the way to go. I recently benchmarked the scaling of the
>> CVS version, and with 8 independent jobs we get 85-97% throughput
>> scaling, depending on the type of simulation. And you get essentially
>> the same performance if you run two jobs using 4 cores each.
>> Even for a single simulation parallelizing over all 8 cores (lots of
>> communication), the scaling is 70-90% with CVS.
> I'll second that. With our systems, we got around 80% scaling on 8
> cores as well. Considering the relatively low price of the quads, I'd
> definitely go with the quads.
> Besides, density might be an issue as well: a single unit in a 19"
> rack can easily cost 1k$ or more, so doubling the density may save a
> lot of money.
> A.
> -- 
> Ansgar Esztermann
> Researcher & Sysadmin
> http://www.mpibpc.mpg.de/groups/grubmueller/start/people/aeszter/ 
> index.shtml
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