I run more than one OS with boinc on it. I have noticed that my linux box seems to be more efficient at doing astropulses..... Both boxes are exactly the same except the linux box has a slower processor, 2.4 ghz on linux compared to 2.6 ghz on windows. Right now it has taken almost 41 hours to do 24.5 % on Windows XP sp3 and 32.5 hours to do 26.5 % on kubuntu 8.10 linux.... Both boxes are allowed to run constantly, and the windows box sees less user activity than the linux box. I am just using the boinc client on both of them from the site...... Anyone else look at this stuff, or has anyone else done any comparisons on different OS's running the boinc client? I will post the final results when they complete....