Are thise with Dual Cores benefitting from running witth affinity set to CPU 0?Thanks

Not in my setup, no. If you are running alot of background programs, then yes FSX will benefit from one core taking the load for other programs while one core runs the simulator. I use FS Autostart and a custom setup from FS-GS.com so that I'm running virtually nothing in the background other than the sim, hence not much difference where FSX is concerned. I also tried the trick of getting the two processors to split the workload, the well known hotfix trick--but unlike FS9, FSX is not responding to this technique.For the record, my processor is a FX-60 dual core.

>Are thise with Dual Cores benefitting from running witth>affinity set to CPU 0?I don't think so. By setting the affinity of a process to a single CPU, you tell the OS that ALL threads of that process should only execute on that single CPU. Since FSX does use some multithreading and will use a few % of the 2nd core, I cannot imagine how this could improve anything.Like the other poster already said, it *may* help when you run a lot of background processes, but generally, you shouldn't do that while simming.

Ok, then my question is:With a hyperthreading CPU like the P4 3.4, I run with only one on the affinity and I get much better results. With the same setup on FSX should I also be using this or should I leave the hyperthreading alone? regardless, all background programs are shut down using FS AutostartClayhttp://www.dreamfleet2000.com/gfx/images/F...ers/Dopke01.jpgClayton T. Dopke (Clay)Major, USAF (retired)"Drac"