Alright, FSX is in, no tweaks, no nothing, just one clean install.
Settings
1024x768x32
Frame lock, 30
Light Bloom
Lense Flair
Advanced Animations
AA x16
AF x4
Global Texture High
Level of Detail Radius: Medium
Mesh complexity: 60
Mesh Resolution: 19m
Texture Resolution: 2m
Water Effects: High 2x
Scenery Density: High
Autogen: Normal
Special Effects: High
Weather / Traffic: Maxed
FPS: Lowest: 2.4 / Highest: 22.5 / Average 8.7

Cheers
Cameron
Not impressed... I know you didnt tweak it but here is what you need to do and repost a shot...
1. Light bloom is for next gen DX10. Not even 8800 can handle it... shut it off
2. Autogen set to sparce is 1.5x greater than the autogen in FS9. Set to normal its almost 5x. You must tweak the config file and then the slider to balance the load.
3. Traffic maxed is insane in FSX. In FS9 with a good replacement it would be 90%. You can forget traffic in FSX right now because they messed up the models and overloaded the CPU calls on it. You can replace all the airliners and GS with frame friendly aircraft and remove the trafficaircraft.bgl file when that is done allowing the replacement traffic schedules to take over, and then set a value of about 50/75 in FSX.. otherwise forget it.
4. Ground texture set smaller than 1m is a complete and total waste. You get NO better image from 1m than you do from 7cm except the roads themselves until someone comes out with a texture set designed for 7cm. Set it to 1m, NO MORE.