FSX: (Intel Quad Vs Duo) or (AMD X2 Vs X4)?

i´ve been googling and found ANY "graphic" benchmark of FSX with SP1 (its supposed that it enables multi core). I read a lot of speculation but any real benchmarks.
Can someone run FSX SP1 with a quad with two cores enabled and then with all of them?
I cant do it because i´ve a pentium D 925, and in a week a ll have an 9850.

Maybe this shouldnt be in CPUs but i didnt know where it could better fit.

I don't have any benchmarks, but my guess is that a core 2 quad with 4 cores enabled will perform best. FSX is a very cpu-intensive game and the extra cores will help it.

Yes FSX will use all 4 cores.You will get substantial improvement with a quad core CPU (about a 80% improvement).I built a 9850BE system and it runs FSX well and very smoothly.
I am running in 1280 by 1024 resolution.
FSX is very configurable and you can turn down many different settings a little bit for higher FPS.My recommendation is to get the FSX Acceleration add on along with FSX.