[H] motherboard monitoring

[Winterlight]

I haven't done any overclocking since the Celeron 300 days. However, 
I have a five year old dual Xeon 3.06 that I am playing around with. 
It has a ASUS PC DL Deluxe board on it that is setup to hold steady 
the PCI, and AGP BUS while increasing frequency from 133 to 175. I 
increased the frequency to 140 which up'ed the CPU speed to 
3.2Ghz  and notice nothing bad. I do notice a little snapper 
response, ... which surprises me. You wouldn't think I would notice 
anything increasing it just 5 percent.  Now I am going to up to 3.4 
Ghz which is an 11 percent increase.

 I want to be able to monitor temps and stability. The Asus 5 year 
old motherboard monitoring utility won't install so what third party 
software is best for watching temps? How can I best test for 
stability and reliability?

Thanks