Ok I did all the suggestions but no good. I even tried experimenting by putting my vcore all the way up to 1.80! It took but as soon as I ran Prime95....it freezes. Any other suggestions?
WHOA man. I don't know why anyone hasn't said this already, but what is your overclock (if any)???
1.8v is VERY high, way past the limit for vcore (max safe is 1.55v). You should NEVER set your vcore past that let alone to 1.8v, you're lucky you didn't fry it
I have the same chip (Phenom II x2 555 BE unlocked) running at 4ghz 24/7, well 4ghz on the first 3 cores and 3.7ghz on the last, and it's tested prime95 stable for 12hrs. I only use a vcore of 1.5, as well as loadline calibration of 0% and VDDA 2.8, so my vcore is about 1.49 idle and varies between 1.5, 1.52 and 1.55v under load.
Regardless, my chip needed NO voltage increase whatsoever from unlocking cores. The default volts (1.4v) was enough to unlock it AND overclock it up to 3.5ghz. Any higher than that needed a voltage increase.
I would agree with Badwrench,
Put your bios back to factory defaults and run prime to get a baseline. Monitor your temps and confirm speeds of cpu and memory in cpuz. Also note what voltage your cpu runs at under load.
Do this, note your vcore (on my C3 revision 555BE it is 1.4v, on a C2 550BE it was 1.35v). Leave it alone for the purposes of unlocking until you figure out how many stable cores you have, then try to overclock as high as you can stably without raising the voltage, only raise the voltage if you find it needs more.
Your BIOS and motherboard settings also matter.
For example you may have an option in unlocking method (ACC). Mine is disabled - per core - all cores - auto (unleashing mode - enable/disable)
For my system I just use "auto" and right below it a entry appears called unleashing mode, which I enable.
However I've read that on other motherboard brands it can be different and the 'unleashing mode' if present is unstable. In this instance, use 'all cores' or 'per core' instead.
There is also a setting on the same page, probably if you enable 'per core' unlocking that allows you to adjust the ACC threshold in increments of 2%- see this thread
Mine is set to every core -2%
Additionally you may also try updating your motherboard bios which may add some of these features if missing and will probably increase stability of unlocking in any case.
IF you try all of these options and none of them work and it still fails, that means you have either a bad/cheapo motherboard or simply a CPU that can't unlock.