Server 2003 better at folding than Windows 7?

[yggdrasil]

I have my windows 7 system and fold on it (not so much lately)

And i use to run 5 to 8 instances of CPU folding to get it to use most of all my cores on my i7 870 HT on

I also have a server 2003 with a i7 860 with HT turned off in it and I was setting up CPU folding on it today and I started 4 instances of CPU folding on it and BAM straight up to 100% load. So I closed 2 and only had 2 running, still at 100% load across all cores so I left one instance running and it was at 60% to 80% and on both systems in the folding config it was set to 100% CPU load.

So my question is, is windows server 2003 better for folding?

I didn't think it would make much difference but it seems to, I yet to measure the daily results tho

 

[hmmblah]

You should only be running one instance with the -smp flag. That will load how ever many cores you throw at it to 100%.

Edit: I haven't noticed any difference in PPD with 2003, 2008 or Win 7 as long as you have your folding set up the same across all platforms.