I just hooked up a 80mm fan to the power fan socket on my MB. When i look at my fan monitor (Asusprob) it says: Power fan below threshold. The settings minimum is 600rpm so why isnt it detecting the fan?
I assume by 'ya it is' you mean it's faster than 600. I know my ASUS board likes to say the power fan has stopped when it hasn't, are you using the release BIOS or an updated one?