Have you attached a motherboard speaker?
You won't get any audio warning, without one attached correctly.
yes, speaker is attached and working, it beeps during startup. I have adjusted the temp ranges and tested many times with no alert. This applies to temp warning and fan speed. Is there some other setting in the BIOS that could be affecting it?
And i dont know if it makes a difference but the system is overclocked. more the reason and need for warning sound.