Unlocking 4th core Athlon II x3 455 w/ A880G+

[bragz]

Hey all. Just got a Athlon x3 455 and a Biostar A880G+ motherboard. I'm new to unlocking the 4th core. During the boot I see a "xxx is enabled, press f4 to unlock". After that I get the blue screen of death when windows starts and t reboots. Then I have the option of pressing f3 to unlock 3rd core. Hit f3 and it goes back to the option of hitting f4 (i dont this time) and it goes into windows fine. Am I missing any steps or is the 4th locked for a reason which is what Im assuming? Thanks

 

[das_stig]

Have you adjusted the cpu voltage, some cpu's using unlocked cores next a little extra help to maintain stability, or you just could have a dud core.