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Unlocking Phenom II 550 with GA-MA790GP-UD4H

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March 21, 2010 8:43:56 PM

So far I have been unable to unlock the 2 disable cores on the (Callisto) Phenom II 550 using this motherboard. I've selected "Hybrid" and "Auto" in the BIOS, Motherboard Intelligent Tweaker, saved and exited. When my computer reboots it never gets to Windows (XP) but loops through the Gigabyte splash screen and the screen that gives options on how to start (Normal, etc...). Does this indicate that I can never unlock the two disabled cores or are there other options? My understanding was that even if you can't unlock the 2 cores you should still be able to open Windows and see (through CPUID) that the 550 remains the same with 2 cores. Sorry, long question, but thanks for any help!
a c 177 V Motherboard
March 21, 2010 8:47:55 PM

I'll hunt around a bit - seems to me, a lot of boards require an older BIOS rev to do this, as AMD had a lot of manufaturers disable that capacity in later releases...
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a c 177 V Motherboard
March 21, 2010 10:08:53 PM

...far as I know...
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a b V Motherboard
March 22, 2010 1:58:30 AM

it may need a voltage boost to the CPU, and also to the northbridge.

try these, to see if you can boot into windows.
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March 22, 2010 2:40:31 AM

Thanks welshmousepl, bilbat. I have the CPU voltage at 1.4 (+0.050v from norm), but northbridge to what?
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a b V Motherboard
March 22, 2010 3:11:51 AM

give the NB a 50 millivolt boost also. see if that helps (should need more than that).

the CPU may need a little more, but try the NB first.
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