[gmx-users] opteron benchmarks

[David van der Spoel]

Hi,

FYI, I've done some benchmarks on our new 2 GHz Opterons. I have two
dual machines which are connected directly by a Gbit ethernet cable
running at full duplex. The numbers are the regular gromacs benchmarks
run using grompp -shuffle -sort. For comparison results on our Dual 2.2
GHz Xeon are given as well. Results in ps/day

		1 CPU	2 CPU	4 CPU	2Xeon
Villin		9340	18180	19190	13280
LZM		2541	5080	7200	3756
LZM-PME		1600	3086	3756	1920
DPPC		185	419	702	330
Polymer		4192	7714	9394	5268

Conclusion: scaling to 2 CPUs is excellent, four CPU's is only worth it
for DPPC. Furthermore the Opterons are quite a bit faster (35%) than the
Xeons, this might be due in part to the larger cache (1 Mb iso 512 kb).
The Opteraons are more expensive than the Xeons, but their GROMACS speed
at 2 GHz is roughly comparable to a 3 GHz Xeon.

-- 
David.
________________________________________________________________________
David van der Spoel, PhD, Assist. Prof., Molecular Biophysics group,
Dept. of Cell and Molecular Biology, Uppsala University.
Husargatan 3, Box 596,  	75124 Uppsala, Sweden
phone:	46 18 471 4205		fax: 46 18 511 755
spoel at xray.bmc.uu.se	spoel at gromacs.org   http://xray.bmc.uu.se/~spoel
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++