i don t like how fast move the player

Similar issue.

Win 7 64 Bit
I7 960 o/c 3.85Mhz
GTX 680 twin frozr III Msi

my cpu and GPU less than 50%

in vehicule my fps go down like 20 fps

About the showcase helico BI seems to know the performence issue chek in DESIGN http://alpha.arma3.com/known-issues