The latest Nvidia SLI driver 9147 has a set of vertical lines on the left side of screen and SLI printed in lage letters in upper left corner. I got up to 167 fps, thats right ..167, but much less when tracers from ground in view.
I had to go back to the driver in the CD, 8421. Works great I did not like the new control panel anyway.
How 9147 records FPS in excess of my refresh rate (100) is beyond me.
8421 shows a steady 100FPS, dropping to 80's momentarily when bomber flames or a very low high speed pass over the airfield.
Amd 3500 64
Nvidia 7600GTXXX SLI x 2
Asus AN8 SLI Deluxe:aok