AMD Phenom II X555 BE, Core unlocked is unstable

[beqa11]

Hello, here is my build
CPU: AMD Phenom II X2 Black Edition 555 3.2 GHZ 6MB L3
Cooler: Aftermarket Ultra silnt cooler
Motherboard: Gigabyte GA-MA785GMT-UD2H (2 PCI, 1 PCI-E x1, 1 PCI-E x16, 4 DDR3 DIMM, Audio, Video, Gigabit LAN, IEEE-1394)
Ram: 2X2GB Gskill 1600 MHZ
HDD: 950 GB (200 GB +750 GB)
Video: ATI 4850 512 MB ყუთით
PSU: Rosewill 630w 12V 50a 730w peak power. 80Plus Active PFC

I unlocked other 2 cores, and it showed my that my build was now Phenom X4 B55, but the system is unstable, when the windows loads , the screen lights up and down, wasnt able to run Prime , the system didnt let it run. I ve changed some voltages and there are numbers next to cores from -12 to +12. I tried almost everything i knew and my friends also helped me, but i couldnt make it stable, My one friend said that core unlock isnt stable at SB710 Chipset , it needs al least SB750, if there is anybody who can help me , i ll be very glad, thanks

 

[machvelocy]

as stated often by many review websites, unlocking core has a very slim chance to unlock fully-stable cores. so you might be one of the large majority unlucky unlocker .

i dont know much about southbridge being a factor, however it should be noted that unlocking cores also increases the CPU's TDP. your best bet for now is to unlock just one core and makes it x3

 

[beqa11]

I ve made it X3 but again it isnt stable, so it means I m unlucky

 

[$hawn]

I ve made it X3 but again it isnt stable, so it means I m unlucky

well do u have a option to select which one of the 2 disabled cores is enabled?? if so, try the reverse combination, disable the current enabled locked core, and unlock the other one.....see what happens
Getting a deneb with 2 bad cores at this point of time is really bad luck IIRC AMD had really good 45nm yields towards the end with the C3 stepping...

Btw is it stable if u drop down the freq....say to around 2.8Ghz or lower??

 

[beqa11]

I ve tried that also, but its unstable again

 

[$hawn]

I ve tried that also, but its unstable again

Then my friend u have very bad luck
Anyway u got what u paid for, which is an X2, crank up the clock on those 2 cores as high as u feel is safe Better luck next time

 

[amuffin]

Those are the reasons why AMD locked them.