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Phenom II "B" processors - Page 2

post #11 of 18
Yes, the stepping code can tell you what actual die you have under the lid.

It isn't a "B" CPU, but I got an x2 220 on eBay about two years ago that was a quad in disguise. It was CACDC, and I looked it up here:

http://www.cpu-world.com/step_codes/C/CACDC%20AC.html

It unlocked to a tri-core (fourth core was bad) with a full 6 MB L3 cache. Pretty spiffy.

Always get a good look at the IHS before buying one of these used CPUs.
post #12 of 18
Actually I believe what's in the model name is more likely to let you know what's there, stepping itself is an indicator of how well it may do for OC'ing.
The chip's date is normally a sign of your chance of success in unlocking core(s) and stepping does figure in on that too.

The chip's model name of course is the thing - Note my B22 is a 22 by name, some here have been shown to be a B55, B59, B75 ect..... Be sure to checkout the CPU World database to identify any potential purchase for unlocking cores.
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post #13 of 18
Quote:
Originally Posted by Kryton View Post

Actually I believe what's in the model name is more likely to let you know what's there, stepping itself is an indicator of how well it may do for OC'ing.
The chip's date is normally a sign of your chance of success in unlocking core(s) and stepping does figure in on that too.

The chip's model name of course is the thing - Note my B22 is a 22 by name, some here have been shown to be a B55, B59, B75 ect..... Be sure to checkout the CPU World database to identify any potential purchase for unlocking cores.

This is basically what it is, two CPU's of the same stepping can yield different results when unlocking cores so it is luck of the draw mostly as far as I know.

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post #14 of 18
Just picked one up for $20, B59 with a Callisto. Hope she unlocks fine. If not, I'm good with a dual core for my HTPC still. s939 rocking it still anyways. biggrin.gif

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post #15 of 18
If your chip is CACDC then it's a failed 965/910e so it might unlock.

If your chip is AACDC it's a failed 975 and it might also unlock.

Sometimes chips from a particular model will have an unexpected stepping (example: my x2 220 officially isn't supposed to have any CACDC chips, yet I have one), so you may have a different stepping. You'll have to look at the IHS.
post #16 of 18
Quote:
Originally Posted by Liranan View Post

This is basically what it is, two CPU's of the same stepping can yield different results when unlocking cores so it is luck of the draw mostly as far as I know.

Actually I was getting at what was under the lid of a chip, as said some chips are Regor core and there's nothing to unlock with those.


Stepping itself is really more of a performance indicator than anything else.

Stepping can be an indicator for unlocking because the date range it would fall into, the actual date being more important related to unlocking because it's known that certain batches do much better than others do and the date is a good indicator.

For example my 555BE is a 1004 dated chip, those are known to have a high success rate for unlocking even though it's one of, if not the oldest of dates for a Callisto chip and mine unlocks fully - 100% stable without the need for extra voltage or anything.

It was also speculated the reason for such a high unlock success rate with that date was AMD purposely disabled good cores that would have passed for a Deneb and simply made these into Callisto chips due to the high demand for those chips at the time.
That's just rumor mind you, nothing more.
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post #17 of 18
So my B59 dual core @ 3.4ghz turns out to be a retail PhII 555, dual core 3.2ghz CPU. :\ Good(er)? Worse?
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post #18 of 18
No real difference. You might be able to unlock some l3 if that B59 has no l3 enabled by default.
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