I have a viewsonic 2035 display with a radeon hd 4870. I recently noticed that my resolution is 1600 x 1200 and that 1680 x 1050 is not even listed in ATI Cat 9.10. My native res is 1680 x 1050. My os is win x64. Reinstalled Cat 9.10, no change. Maybe new driver will fix this. Also, dual booting wiht XP and no problems, res is at 1680 x 1050. Any Ideas?