I think THG is witholding a few details there. I showed
jhites how to run the Ars Technica standard WU on SETI@Home on his i875 system with a 3.0C and tweaked memory timings.
- For a single instance of the client, his system completed the standard 0.417 WU in 2:10.
- For two instances, his system completed in just a hair under 3:00 for both WUs, or 1:30 per WU effectively. Obviously the i875's flavor of Hyperthreading is working well here... but THG makes no mention of this little trick at all, AFAICS.
Here's
jhites' thread for those interested:
thread
I made a "SETIbench" test that includes a batch file to run the client with the -stop_after_process switch, the Ars Technica 0.417 WU, a link to where the client can be downloaded from Berkeley, and a link to the AnandTech S@H FAQ. I think this may be hosted at AnandTech soon, so the fiends in the CPU/Overclocking Forum can put their systems through the wringer

For those interested in seeing the SETIbench, it can be found
here (Zip format).