Ok, I just purchased and assembled my new FS rig. Here are the specs.
Motherboard: ASUS P5N32-E SLI plus
CPU: Core2duo 6600 2.4 ghz (overclocked to 3.4Ghz)
RAM: OCZ Platnum PC6400 1024 x 2 (2 gigs)
Power supply: Gamexstream 700w
Video Card: XFX Geforce 8600 256 mb PCIe
Hard drive: Seagate 250gig 7200
Case: Thermaltake Armor full tower.
So is this enough machine to run FSX maxed? YES!!!
Although I bump the autogen down to dense most times for more smoothness, it still doesn't become a slideshow when on very dense, even in the largest cities. I always max everything else. Lightbloom is the only thing that I really don't need so I keep it off. Ansotropic and anti aliasing are on.
And man what it does for FS9. Fully maxed...any city. I have it locked at 30fps and it never falls below that...ever!
So, here are 3 videos. The first is the computer. The next is Las vegas in FS9, and the last one is Las Vegas in FSX.
Two things to remember here.
1st: Both sims are maxed
2nd: I'm also running a video capture program which kills frames, and still the sims run well. The video isn't the best quality.(youtube) but you will get the idea.