Question : Problem: Upgrade from Pentium II 350MHz

I'm running a Pentium II 350 MHz CPU in a slot 1 motherboard. What is the fastest CPU I could upgrade to? Any of the Pentium III's?

Answer : Problem: Upgrade from Pentium II 350MHz

The fastest you can go is probably 550 MHz.  100 MHz bus with a specific voltage requirement (you probably have a 440BX chipset - they were QUITE popular.  I have seen cards that will adapt a 1.4 P3 to your board (I used to have several 440BX boards) but the cost wasn't really worth it - you can get a bare bones system 4x the speed of your current one for $250 or less, assuming you are in the US.