OK, in another post I mentioned that I may have stumbled upon something on my own Core 2 Duo laptop that improved stutters ALOT !Do the following ( especially if you also use Activesky V6.5 ) :1. Open Task manager and go to your FS9.exe process2. Right Click "Set Affinity"3. Check only CPU 1 to run FS9 under.4. Click OK and close task managerDo step 1-4 for Activesky ( ASv6.exe ) process but choose the "other" CPU so that each of them run on seperate core's ( FS10 on CPU0 and ASV6 on CPU1 or vice versa )For me this eliminated stutters by about 90%, especially in built-up areas !Please let me know your own findings !Hope this helps someone !Cheers !:-wave

we used that in FS9 alsohttp://www.dreamfleet2000.com/gfx/images/F...ers/Dopke01.jpgClayton T. Dopke (Clay)Major, USAF (retired)"Drac"

well it definitely works for me.....there is a tangible difference in my case....I did not imply that it's a new discovery, just something that C2D users could try to see if they experience similar improvements.

My mobo assigns equal workload to each processor, so I tried this knowing that, and as expected I actually got a decrease in performance...

Setting affinity to just '1' rathern than 0 and 1 actually increased performance for me.IF you look at the CPU utilization...it went from 52% to 58%-62%.Now, how do I autoset the affinity for FSX every time I start? could that be done? So I don't have to go and do that every time?Also... How do I set priroty to bet as high? I am not sure if that helped..but it didn't harm.Manny