[gmx-users] Athlon SSE vs. 3Dnow

[Anton Feenstra]

Hi,


I noticed that on our old, single Athlon 1GHz nodes mdrun uses the
3Dnow instructions, while on the new, dual Athlon 1.3GHz it uses the
SSE instructions. My feeling is that the (Athlon specific) 3Dnow would
be faster. So, why is SSE used? Is SSE (if available - the 1GHz CPU's 
don't have it) or 3Dnow faster on Athlons?


-- 
Groetjes,

Anton
 ________ ___________________________________________________________
|        | Anton Feenstra                                            |
| .      | Dept. of Pharmacochemistry - Vrije Universiteit Amsterdam |
| |----  | De Boelelaan 1083 - 1081 HV Amsterdam - The Netherlands   |
| |----  | Tel: +31 20 44 47608 - Fax: +31 20 44 47610               |
| ' __   | Feenstra at chem.vu.nl - http://www.chem.vu.nl/afdelingen/FAR|
|  /  \  |-----------------------------------------------------------|
| (    ) | Dept. of Biophysical Chemistry - University of Groningen  |
|  \__/  | Nijenborgh 4 - 9747 AG Groningen - The Netherlands        |
|   __   | Tel +31 50 363 4327 - Fax +31 50 363 4800                 |
|  /  \  | K.A.Feenstra at chem.rug.nl - http://md.chem.rug.nl/~anton   |
| (    ) |-----------------------------------------------------------|
|  \__/  | "I'd Be Water If I Could" (Red Hot Chili Peppers)         |
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