CPU - Corei7 - 3.5 ghz - quad
RAM - 16 GB
Vid - GeForce GTX 770 with 4 GB on board RAM
Windows 7
Resolution - max - 4096 (probably not supported by my monitor -- should change to 1024 -- just saw HiTech's post -- not sure about this), FOV 106, Environmental slider = 0, reflections off, disable shadows, disable post lighting (enable all the check boxes under post lighting), sliders set to max detail except trees which are middle of the spectrum.
I'm maxing out my frame rates for my monitor (60) no matter what the situation - at altitude, low, furball, bombing run, dive bombing, CVs etc. For me, the biggest deal was the environmental slider. Anything other than 0 gives me a frame rate hit (last time I checked). I'm loving the game! My only issue so far is now and again, the game collapses to desk top as if I hit Alt-Tab. I have no clue. One thing did drive me crazy. I was up and getting frame rates in the teens and 20s. After using my extensive vocabulary, I found out my virus scanner decided to run a PC scan while I was playing the game. Duh!