thanks for the info, sp33.

Moreover, I would find it strange for F@H to be so much cache sensitive. The main original core (gromacs) is not. But it's possible that this happens, since they modified the program a bit (lot) and recompiled it with intel compilers (which I guess would make exectuable files that are really cache hungry). Original gromacs is compiled with gcc, but to make sure it spoilts the best from each architecture most important parts of it were entirely written on assembly (to make proper use even of SSE2 instructions) for mostly used platafforms. Of course, it includes both intel and amd 64 bit processors.

Btw, if someone has a linux kentsfield, and one of our friends with Barcellonas has a linux installed also, we could give it a try. At least a single core one (it scales in a pretty well, but having to install the MPI packages is not that fun AT ALL) would be easilly done.

Do we have the two volunteers here?

P.S.: dual-channel is still being a problem with barcellonas? Even in the L1N? bastards! :p