After much tweaking I was able to get my Duron 600 and A7V to start up Windows98 at 1GHz (10 X 100) with 1.85V. It ran OK for a while but was a bit unstable so I tried 997MHz (105 X 950) and it seemed to stabilize but still would lock up occasionally. I then dropped back to 978MHz (103 X 9.5) and all seems well. Ran the weekend with no lockups... woohoo! Oh... was also able to drop voltage to 1.80V. Running between 50 and 54 deg. C according to Asus probe software.
