I am building a new system and was wondering if performance wise, and this would pertain to all gaming not just flight simming,to have the O/S on it's own HD. I figure that since I am starting from scratch that I could have a smaller HD just for XP or Vista and the large HD for games. Gamming is all that this system will be used for.This will be the new specs as of now:nvidia nForce 680i motherboarddual core D930 3.0 chip4gig ram400 gig sata hdGeForce 8800gtx video

Not sure if that would make too much of a difference.I partitioned my HD and kep 15Gig C: Drive for the OS. and the remaining to D: for FSX.I have no objective evidence that is improves performance. I thought its not going to be anyworse and It'll atleast be a little cleaner.MAnny

I have a dedicated computer for FS. Recently I reloaded FS9 and FSX onto a new separate Raptor drive. WindowsXP resides on the original IDE drive with the paging file there. I found a performance improvement doing so. I have not really checked but perhaps I am getting better utilization of the dual CPU cores.I run with an ASUS P5N32SLI-SE motherboard, E6600 C2Duo, evga 7950GT KO video board, 3gig Kingston HyperX memory.For FSX at New York I get 18-20 FPS on the ground with sliders set at 60-100% max, 20%AI, 50% traffic, 1600x1200 resolution. I do run with autogen off since I never have liked the cartoonish look. However autogen detail is set at 100% to fully display the charateristic main buildings and visual features in major cities.I do get some stuttering on fast turns on the ground. Certainly not smooth, but not unreasonable either. Only tweak employed is the BUFFER POOL set at 10,000,000. I find this helps the stuttering somewhat. Fred