Thanks for the replies. Yes, as I expected 4GB appears to be OK for the sim. Even with Firefox and Foxit (Adobe PDF replacement) running in the background, my box does not consume more than 3GB with A-10C running. I've actually never seen the 4GBs used. I am sure that there might be some additional benefits of adding additional RAM but I don't think that it would increase FPS. Right now its pretty much stable around 70-90fps with everything maxed out. When it does dip, never goes below 40fps from what I have observed. :thumbup: