I know this has been touched on in some of the discussion threads, but I thought I might pose the question more directly. Since FSX (and FS9 of course) is not optimized for taking advantage of a dual core CPU architecture would a high speed single core (e.g., a P4 3.8) actually produce better performance over a lower speed dual core (e.g. a Pentium D 2.6 and lower)? And at a cheaper price to boot! This might explain why some with older single core CPUs are reporting better results than more current dual core CPU users. Could related chipset architecture also be a factor in the same regard?Fred

If you add 10-20% to the core speed of a dual core P4, that's roughly the single core speed equivalent for FSX. In the case of your P4 D 2.6, it would be like a P4 3.1 equalent, so the P4 3.8 would easily trounce it in FSX performance. Note this assumes all other components being the same. It gets a little more complicated when roping in the new C2D, as it core is much more efficient than a P4 anything, so a 2.4GHz C2D could easily beat a 3.8GHz P4, even with one core tied behind its back!Gary