Originally Posted by Mithral
Other than increasing the Vcore to 1.46v, what else did you have to play around with?
I'm looking for clues to what I might be missing in getting mine to unlock.
The chip booted right up as an X4. At first, all I did was turn on Advanced Clock Calibration and the ASUS Core Unlocker in the BIOS.
It will actually boot into Windows with all four cores enabled at the stock voltage. However, I soon discovered that it would BSOD if the processor was put under any kind of heavy load. I had to go all the way to 1.46 in order to get it to run stable as an X4 under Prime95.
It will boot at 3.7 GHz at as little as 1.40, but it won't stay stable. If I were willing to go over 1.5v, I could probably get 3.7 stable, but I'm not willing to do that. It does more than everything I need it to at 3.5.
I should add that this 550BE is a fairly late production chip (2011 week 21), and AMD by that time were probably just down-binning perfectly functional X4s as a matter of course. You said yours is more than two years old, and it's probable that yours just has two cores with defects that make them unusable.Edited by jsc1973 - 1/2/12 at 11:15am