Thanks again, Jim,I appreciate the help.:-roll

Here's an idea:Did you try testing the system out in a more "normal" situation? Every system in existance will struggle with 3D thunderstorms, 100% AI, high detail VCs and high detail scenery areas all thrown at it simaltaneously. You may be expecting too much. All of that is one killer workload on the system.Try a test in fair weather, with perhaps a slightly less detailed aircraft. I don't know if your old system is still hooked up, but if you could compare the same flight/aircarft against both systems, then I am tempted to think you'll see a good increase in performnace. I recently upgraded as well from a Athlon 1900+/768 MG Ram/Ti440 128MB to a Athlon 3200+ 64bit/1 Gig RAM(PC3200)/5700LE 256 MB. I'm running the sim at 1280 X 960 with 4X AA and AF (There's really no point in high res and high AA, one or the other will work well enough) and fps are generally in the 20s (locked at 24) in fair skies with most any aircraft. 100% AI at most airports won't bring me down to less than 10 fps. However, overcast cumulus clouds will bring me crashing down to 6 fps, which is the same as my old system. I haven't tried Thunderstorms out yet, but I'm sure they'll be just as bad. It seems then Cumulus/T-Storm clouds are the biggest killers. Overcast stratus clouds aren't that bad though.So, in conclusion: Clouds are the biggest killers (in my opinion). The new system should let you run most everything else with better performance however.Joe Wagner

Press Ctlr-Alt-Del and check the CPU occupancy. If it is not near 100% then you are graphic card limited. One way to speed it up now is to loose grphics options that won't be passed to the CPU for processing. Stuff like resolution, texture size, lights, multi-texture (render to texture). The CPU will help most other display options like autogen, scenery complexity, et al.