Howdy:Well, I have an i7 950 with Vista Ultimate 64 bit. Not sure if this helps, but I've been happy for the most part investing in a new system. That said, I was hoping to get a lot better performance out of FSX - it's pretty good, but I was wanting better than 20-30 FPS at hub airports with UT2 and REX2.0. I do have my FSX sliders at high settings though. I'm pretty much of the opinion that if I want to dial back sliders, I might as well max out FS9 and be an FSGod, which I still do often :( . (50-60 FPS at KLAX and EDDF with WOAI, and lots of custom RetroAI) All things being equal, I'm still happiest in FS9.I fly the PMDG MD-11 and Digital Aviation F100/F70 & Wilco 777 payware in FSX & FS9. RgdsJeremy