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How to unlock X2 555 cores

Last response: in Systems
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May 21, 2010 5:26:06 PM

I just built a machine w/an M4A79XTD EVO mobo and X2 555 cpu. I would now like to unlock cores if it will.

What is the best way to unlock a core? There was software that came with this mobo, but it may be just to OC. Can I use software to unlock cores, or must I go into BIOS?

Possibly more important, if I unlock and it's unstable and won't boot, how do I tell the system to just ignore my last change (ie the unsuccessful core unlock) and revert to the two good cores?

Thanks for any advice!

More about : unlock 555 cores

May 21, 2010 5:56:59 PM

You must go into BIOS.

I don't think you can even unlock them and have them so unstable you can't boot.

Most of the time it just wouldn't let you do that.
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Best solution

May 21, 2010 6:26:33 PM

1. Go into the BIOS.
2. Enable Advanced Clock Calibration (ACC)
3. Activate Unleashing Mode
4. Select the number of CPU cores to unlock.
5. Reboot.

6. Read some guides about overclocking that CPU.
7. If an OC or unlock fails, it will reboot automatically to fail safe settings.
If not just reset CMOS.
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May 21, 2010 6:28:36 PM

I will see if I can find all that.

In your worst case above, how do I reset CMOS?
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May 21, 2010 6:31:28 PM

Press the restet CMOS button ont he mobo.

Mine has one on the IO shield ;) 
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May 21, 2010 7:35:25 PM

The M4A79XTD EVO doesn't have a CMOS reset button just like a lot of motherboards. It does have pins that can be used to reset the CMOS with a jumper, though. The motherboard owners manual should have instructions on how to reset the CMOS.
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May 25, 2010 1:34:36 AM

great. Thanks!

btw, it did work, unlocking to a quad B55 3.2 ghz.
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May 25, 2010 1:34:56 AM

Best answer selected by mgkunkel.
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May 26, 2010 1:44:22 AM

Good to hear it worked. Congrats on your free upgrade.
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Anonymous
October 31, 2010 9:32:18 AM

I just built a machine biostar TA790GXE 128M and X2 555 cpu. I would now like to unlock cores .
i had recently tried to unlock all the cores but failed.i had updated my mobo bios then also i coudnt..in bois i had no option like "unleashing mode"...plz help me...

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October 31, 2010 3:15:31 PM

Wow necro.

Rember thsi thread form like 10000 years ago
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