The sawtooth effect is a lack of enough video memory had it happen to me twice, first was in Phase II was running ( cat's pajamas then ) a factory overclocked 8600 complete with Zalman fan 256mb DDR3
Great picture, just don't move your head. . . Put in a much tamer 8600 512mb DDR2, the picture wasn't as chrisp, but the Jaggies were gone.
Next time was a GTX260 896mb DDR3 Couldn't afford more card. So I just moved my head slower, that worked most times, except in combat
Now a GTX480 1500mb DDR5. . Think I'll never see them again
There's no such thing as Bad Weather, only unsuitable clothing