For comparison performance in ArmA2
http://www.bit-tech.net/hardware/gra...0-3gb-review/4
(visibility 3600 m. only, not maximum 10 000)
Flanker, did you try pseudo-fullscreen mode? Luthier mentioned it may help ATI cards.
Also if you can quickly look through this list maybe you notice something that can hold the card back if it is not the CPU or drivers (like antivirus real-time shields, epilepsy, etc.)
http://forum.1cpublishing.eu/showpos...4&postcount=13