Quote Originally Posted by [XC] 4X4N View Post
OS's can make a difference. I was running linux with my other quad. 2653 wu's would take just over 6 min per frame. Same set-up with windows was about 7 1/2 min per frame.
I can definitely see that.

I think the problem lies with the use of MPI, which is actually a Unix port to Windows, not windows native multithreading, so there's a huge hit there until the experts get that sorted out. Personally, I think it's the worst way to proceed, Windows makes up the bulk of systems in the known universe (good or bad , it's the truth) and here we are resurrecting a message passing interface based on old fortran junk. But it's really popular with anyone trying to track movement in space (outer or inner such as molecules). In conclusion, it sucks and we're stick with it.
/rant

Anyhow, the fact that Linux as a Unix clone does better at MPI is no surprise at all so let the Linux boxes rock on