Hello, I have just downloaded this little tool in the hope it might help me understand what to do to improve my graphics.
Having done so, I haven't much idea of what to do next. perhaps you can help me.

To explain the problem.
I play a subsim game called Silent Hunter 3.
I run 2x nVidia 7600GTcards in SLI
Previously the game ran perfectly, but since I reformatted, the rigging of the boats degrades to little black squares, which makes it look like there are birds sitting on it. When I first bought and ran the game I had the same trouble, but with an extended modifications packet, which practically gives you a new game, everything has been fine, until now.
I have tried tweaking the AA and the AF, with no change. Other people running the same card(s) are not reporting these effects.
I also have the latest driver.
Can you advise if this little tool can help me and what I should do next please?