I have a PIII 550. Multiplier is locked, so no upping there (don't know about downing). So far, this is what I have done:
Standard:
FSB: 100MHz
Multiplier: 5.5
Voltage: NO IDEA
MoBo: No idea either, other than it has Award BIOS, VIA chipset.
Speed: 550MHz
New:
FSB: 112
Multiplier: 5.5
Speed: 616MHz
Hmmm....
The MoBo supports 133MHz procys. Wonder how fast an OCed PIII 1.4GHz can get......
The main focus is the 550.