For an EPoX here are some values you should monitor based on onboard sensors(some of which you will have to rename in MBM5):
1. CPU Fan
2. CPU Temp
3. Vcore(voltage to the processor-default on you XP 1600+ is 1.75V although it might read a little higher 1.79V)
4. +3.3V
5. System Temp(some people call this case or motherboard or ambient, it is usually 3-10 degress lower than CPU Temp)
6. Chasis Fan(if you have it plugged into the motherboard)
7. +5V
8. +12V
9. Vdimm(the voltage to your memory, default on your motherboard is 2.50V, might read a little higher, 2.59V
10. Vagp(as explainded in previous thread)
Of course you could add more, those are main basic ones for your motherboard