Ok here is the deal. I built three systems. Two of the duron 600's would only do 850mhz in mine. One did 900mhz. I kept that one. After about 4 days I had to reboot and all of a sudden it locks after the windows me screen. I have to back it down to 850mhz. Everything is fine. Then my friend calls today and says, "I got that duron to do 900mhz" It would only do 850mhz in mine! Now mine only does 850mhz. He said his cpu is between 48-50c. Mine never goes over 46-37c but locks at 900mhz. There must be something I am doing wrong!
