Ive been through this with both Nvidia and ATI cards with FSX for a long time.
I had given up but before I go on another settings slugfest thought I would ask of anyone had splved theirs.
I think, I know thats not good but I "think" its either my LCD/TV monitor or res preventing vync from working. Problem is Ive lowered my native 1920x1080 and it still tears mid screen. Not all the time but very noticable on quick planes and swinging tails turn with helis.
My tv is a Sharp LC-32GP1U5. Made for gaming with a speed of 5ms. V card is a 4870 1 gig,latest catalyst.
I have tried unlimited and at 30 fps which it holds firmly at. TBM I have tried from 60-100+ now at 10 and smooth.
I understand most of the Cat settings except some of the DTV/HDMI attribute settings. I have tried both force vsync and on except when prog.I have tried various levels of aa/af to see if I exceeded a limit it would disable vsync. No noticable change.
Any successes,tidbits,tips appreciated. Could be one setting or just another learn to deal with it FSX gremlin. Thanks, Jim