I just got an Abit It5h rev 1.5 with a k6-166. For the first couple of days it ran fine, but then it started to lock up randomly while running Win95. Finally, it locked up during Win95 boot. After playing with numerous motherboard settings, I finally got Win95 reinstalled and running, but it only runs at 60mz bus speed or less. At 66mz it does the same thing, which is lock up during the splash screen. When I mean lock up, I mean this system freezes. No errors are printed. It froze all the time during my attempt to reinstall, it only worked when I used the slowest of settings.
Abit IT5H rev 1.5 w/ K6 - 166
(currently underclocked to 150/60 to run Win95)
32MB 60ns EDO RAM
Matrox Myst 4MB
2.1 GB WestDig HD EIDE