card: amd radeon hd 6800 series
proccesor amd phenom (tm) II x6 1090T 3.21ghz
windows 7.
so the first 3 days i wasnt lagging at all (maxed settings exept ground texture reso 512 or what it is)
now i start lagging when i put shaders on and framebuffer objects.
at the start it didnt lagg at all with those settings turned ON.
so i think i mustv done something wrong or idk

im realy disapointed in this,also when playing my cpu doesnt go above 21?? when lagging it should just use more cpu???
josh told me to change some stuff in catalyst cotrol center but it only stopped the game from crashing wich did before i used those settings.
please help im realy staring to get sad by the fact i bought an 800 euro computer and i cant play the game i wanted to play properly

ps i am able to run crysis 2 maxed out but it isnt as smooth as in the beginning any more