Why can I unlock cores Phenom 560?

[footballguyxx]

Hello,

I have an ASUS M4A77TD mobo paired with a AMD Phenom ii 560 Black edition. I have tried and tried to go to unleashing mode, but computer doesnt boot up afterwards. What am I doing wrong?

 

[itzdanielp]

Asus does not and can not guarantee that every CPU will unlock cores. The way AMD disables them often makes them possible to re-enable, but it will not always work.

 

[Raiddinn]

AMD makes a lot of 4 core processor chips. Some of those have factory defects detected in the quality control stage before they are shipped out. Those get sent back and have the defective core turned off and then they are sold as 3 core chips.

However, due to the price of a 3 core chip being less than a 4 core chip, there is demand to buy 3 core chips in certain quantities, especially by budget conscious people who are looking to shave money off of a build.

The demand for 3 core processors outstrips the number of defects coming out of the factory. To meet the additional demand, AMD sends good chips from the factory to have one of their cores disabled so they can sell it as a 3 core.

It is easier and cheaper for them to make a 4 and sell it as a 3 than it is for them to just make a 3 core and sell it as a 3 core.

The demand for 3 cores is rumored to be about 3x higher than the supply of 3 cores, meaning 2/3 of that approximately needs to be filled with working 4s.

Those are the ones that can have the 4th core unlocked successfully.

It sounds like you were one of the 1/3 that got one of the broken 4s rather than one of the working 4s.

I doubt you will ever be able to boot successfully with the 4th core active, regardless of what you do.

 

[jaquith]

Your ASUS M4A77TD uses 'ACC unleashing mode' which is an if'y way to unlock the cores. Sometimes a slight vCore (CPU Over Voltage) increase solves the boot failure issue, so try +0.10v. In addition, you MUST use the latest BIOS version 2104.

BIOS update - ASUS EZ Flash 2 -> http/www.tomshardware.com/forum/289507-30-what-flash

How to unlock cores - 'ACC unleashing mode' maybe you missed a step:
[flash=640,480]http/www.youtube.com/v/hT5ZFgkRhK8[/flash]

Better ways, on some ASUS MOBOs:
http/www.youtube.com/watch?v=mr1Al1oijxM

 

[footballguyxx]

So if this doesnt work could I possibly send in the processor for a replacement?

 

[itzdanielp]

You could try but it would be highly unlikely you would be able to get an RMA.

From the manafacturer's point of view, there is nothing wrong with the chip, and what you are trying to do would void the warranty. So if you even mention that to them when trying to get an RMA they would say he** no.