From what I could deduce:

The multiplier is controlled by JP10:

• 1.5x: Pins 1-2 closed
• 2x: Pins 2-3 closed

The FSB is controlled by JP9 and JP11

• 50MHz: JP9 pins 1-2 closed, JP10 pins 1-2 and 3-4 closed
• 60MHz: JP9 pins 2-3 closed, JP10 pins 1-2 closed
• 66MHz: JP9 pins 2-3 closed, JP10 pins 2-3 closed

So as far as documented modes go, no way to go past a Pentium 133MHz. With some soldering you might be able to mod a processor to run at a higher multiplier, but the board itself gives you no multiplier options greater than 2x. Anyway, the Pentium 133MHz is an early Socket 7 processor, so I don't see why this board would not accept something like a Pentium 166 or 200 if you find those for cheap - but they will run underclocked at 133MHz.

About FSB OCing - there are a few undocumented settings you could try. Knowing what clock generator the board uses can help you deduce what they do:

• JP9 pins 1-2 closed, JP10 pins 1-2 closed
• JP9 pins 1-2 closed, JP10 pins 2-3 closed
• JP9 pins 2-3 closed, JP10 pins 1-2 and 2-3 closed

With good cooling (a must!) the mmx can run reliably at 3,3v socket5. Choosing a locked 3x66mhz 200mmx would give you a nice upgrade. If there is a locked p200 non mmx it will be the best choice for that board.

meljor wrote:

With good cooling (a must!) the mmx can run reliably at 3,3v socket5. Choosing a locked 3x66mhz 200mmx would give you a nice upgrade. If there is a locked p200 non mmx it will be the best choice for that board.

You can always just solder a few wires and short some multiplier pins in the processor socket itself.

This board has the 430FX chipset, so an AMD K6III-400 will most likely work if you get an adapter. It might also be possible to overclock the FSB to 80mhz (as with other early 430FX boards) using undocumented jumper settings, which will give you a 480mhz system.

See:
ASUS PCI/I-P54TP4 Socket 5 motherboard thread/review