Unlocking the 4th core on AMD 720.

Well, last night had another go at unlocking the 4th core and noticed something different this time. When I set the ACC to auto and booted into windows the AMD overdrive software was red with "Unlock AMD" written at the top in big letters but, still only showing 3 cores working. However on the performance control setting there were more sliders on the voltage settings (bottom right).

Now it has gone back to normal again.

According to Neil at J&W the 720's with manufacture date of 0904 can be unlocked to 4 cores. I'm waiting for him to send me a pre-release bios for testing. :)