Sounds like the fourth core is posing some problems. Not sure what exactly the problem is, but I suggest staying with 3 cores at the moment.
Try posting a thread in here. These people have a lot more experience on unlocking than me.
http://www.overclock.net/amd-cpus/53...g-guide-3.html
its the official 720 unlock thread. You may find someone with the same problem and a solution for it
Try posting a thread in here. These people have a lot more experience on unlocking than me.
http://www.overclock.net/amd-cpus/53...g-guide-3.html
its the official 720 unlock thread. You may find someone with the same problem and a solution for it