Hi guys,I want to buy a new cpu,a Core

if this is solely for FSX, I believe the E6700 would be a better choice - you'll get better performance as its two cores are faster and, with the quad, the additional two cores will only really get use during loading, not scenery rendering etc. which is probably what you will be most concerned about.Andrew

I don't know, I'd go quad core, especially if planning for the future...

I think the E6700 would give you more raw framerate in FS right now.But I would still probably get the Quad Q6600. The fps difference wouldn't be THAT much, and the quad is more future-proof. And yes, future proof with FSX. I expect as we go forward, multiple core usage of the sim will only increase, thus the benefits of the quad will become more apparent.Certainly it's a tough choice right now. No question about that.RhettAMD 3700+ (@2585 mhz), eVGA 7800GT 256 (Guru3D 93.71), ASUS A8N-E, PC Power 510 SLI, 2gb Corsair XMS 3-3-3-8 (1T), WD 150 gig 10000rpm Raptor, WD 250gig 7200rpm SATA2, Seagate 120gb 5400 rpm external HD, CoolerMaster Praetorian

thanks guys for the advice,It certainly is a though choice right now,Thanks again,G

I'd go with the quad, especially as more and more multi-threaded applications roll out, then your quad will shine in all it's glory. ;)