I have a lenovo Y570 ideapad with 6meg and a NVidia GT 555m Got it in October and AH played fine though sometimes the display would go fractally. The stability of the game seemed to get worse as time went by, since the latest update there is an occasional screen freeze/stutter, otherwise 59 60FPS. Playing just a minute ago it froze up blank screen and had to start task manager etc. The graphics don't do the fractal thing with FSX or IL2 or Rise of Flight though I admit I haven't run those very long. (dont play video games really) Can anybody recommend a utility to check my graphics card? I would like to confirm or eliminate it as the cause of the stutter and fractal problem. Settings: 1280 x 1024 no anti aliasing 1024 texture. Graphics under the options are: obj detail middle of slider, ground detail 2/3, display horizon checked, under advanced: buildings cast shadows and bump map terrain checked nothing else, shadow texture 1024. The OS is windows 7 64 bit.