FSX can use 256 but the OS you are using will limit that to 2 physical slugs and how ever many cores are on them unless you start buying the higher level MS server softare
ahh i thought this was a new Intel or AMD chip for PCs... bummer
that's really cool technology though... maybe, just maybe we could crank the FSX sliders up to max on that rig... and if we're lucky we could even hit 30fps