PC2700 had better run at 133FSB

The bios probably has a health check screen that will report temps and voltages.

CPU temps - 55 degrees C seemed to be borderline for my old T-Bird. It'd run forever at 54, but didn't like being taxed at 56.
Northbridge - 35 degrees C seems to be max.

Again, this is a different CPU on a different mobo, but it should give you an idea.