It will run stable at 675(75mhz) and 747(83mhz) at default 1.7v, yet as soon as I put it a 100mhz at any voltage(1.95 is the highest it goes) my comp wont even post.

Its a abit va6 board with latest bios, slot-one board with a slotket, global win hsf(not sure what model).... micron pc100 ram(although it does really ****ty in sisoft memory benchmark - 79mb/s and 87mb/s)

Theres oc or auto bus jumpers on the adapter but the comp only boots at the auto setting.

any ideas? or am I leaving out some vitial info?