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Unlock AMD AM3 4th core

Last response: in Rooting, Jailbreaking & Unlocking
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June 30, 2010 1:01:19 PM

Hi,
I want to buy AMD Athlon II X3 cpu and unlock the 4th core.
I'm going to buy this spec:
GA-880GMA-UD2H
AMD Athlon II X3 ?????
Kingston ValueRAM 2GB DDR3 1333

I was thinking of buy the "AMD Athlon II X3 440 BOX AM3" cpu

Does someone know if this cpu have success stories for unlocking?

Thanks.
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a b K Overclocking
June 30, 2010 3:52:08 PM

These can unlock but I think you get a better chance with the Phenom X2 & X3 than with the Athlon X3.
June 30, 2010 3:57:49 PM

can you give me the model pls.
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June 30, 2010 3:59:03 PM

Hi newcomer and welcome to the Tom's hardware forum.

The Athlon series can't be unlocked for that u need the Phenom II BE series.

1- Phenom II X3 720
2- Phenom II X2 550 and Phenom II X2 555
June 30, 2010 4:19:27 PM

Is there lower processors like 2XX ?
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June 30, 2010 4:30:10 PM

The Athlon x3 440 can be as well I have read posts where they unlocked L3 Cache as well
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June 30, 2010 4:31:03 PM

asher_pa said:
Is there lower processors like 2XX ?

No the 440 you asked about can but it has a smaller chance otherwise only the ones saint19 mentioned
June 30, 2010 4:37:13 PM

and what about 435?
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July 1, 2010 2:55:53 PM

All x3's can be unlocked as they are either a propus x4 or a deneb x4 with one core locked up.(1 core and L3 on deneb) Once unlocked it's a crap shoot whether or not it will even post or load your os. Some times an unlock core will load your os fine but have funky artifacts etc. A deneb core may have a bad L3 so they lock it and a core up and sell it as an x3. Some healthy chips are said to be locked up to meet x3 demands. Unlocking cores requires a board with a SB750 or SB710, the board you listed has a SB850, but lists a core unlocking feature. IMO unlocking cores is about a 40% to 50% crap shoot for getting a healthy fourth core. Don't buy an x3 with hopes of getting a four core, it's just a bonus if you get lucky. Buy a four core if need four.
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July 1, 2010 3:09:56 PM

asher_pa said:
and what about 435?

Sorry yes that to, basically any x3 athlon or phenom and any x2 phenom
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July 1, 2010 3:24:51 PM

I don't think that the Athlon series can be unlocked.
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July 1, 2010 4:12:38 PM

saint19 said:
I don't think that the Athlon series can be unlocked.

Very early athlon IIs were Phenom IIs with the cache disabled. The cache could be unlocked only as much as CPU-Z would read it, but from what I gleaned, they were usually not actually enabled. Long since Athlon IIs moved to their own die without any cache, so that possibility, as limited as it was initially, is completely gone.

Athlon II x3s are disabled quads in the same vein as the Phenom II series. BUT, unlike the PhII x2 550/555be which are disabled quads, the Athlon IIs have their own die. There are success stories of single core semprons unlocking to dual core athlon IIs. The Athlon II x3s can also be unlocked. Having no empirical data base for the success rates, just general perception from cruising the topic as it has developed, it feels as though the athlons are less unlock friendly than the phenom's, and often won't OC for crap once unlocked. This could be because the Phenom IIs are an older part, and have more healthy quads being disabled to fulfill demand.
a b K Overclocking
July 1, 2010 4:19:42 PM

Just get a quad core. Heck, you can get a 6-core AMD for $200! That's over $800 less than the current Intel hexa-core CPU. Sure, the hexa-core runs circles around it, but for most people on a budget, the hexa-core Phenom will do just fine, even with games.
July 1, 2010 6:21:05 PM

Dude your are taking a chance with this. You know not all the x3's will do it and if the other core is a dud then you are out a cpu, buy an x4 or x6 its around 200$. GL dude.
July 1, 2010 6:44:24 PM

Thanks all,

I bought the CPU today..

Before I open the cpu box....
My batch is "1015GPCW"

Is there a place that I can check if my CPU is can be safely unlocked?????

thanks.
a b K Overclocking
July 1, 2010 6:59:02 PM

Batch numbers do not mean it will be successful as there could still be a dud in the batch.

Just try it is all I can say. If it works, you're in luck. If it doesn't, then you'll have to either tweak things like voltage and such to see if that can help stabilize it. If that doesn't help, then you're SOL.

Again, with the price of even AMD's hexa-core CPUs being around $200, you can get a good 4 or 6-core CPU for no more than $200 dollars.

I got my X3 just because of the price and figuring, 3-cores is better than 2. I just got lucky that it unlocked, but then again, that is not the reason I got it. I got it because it was a Black Edition and for the value, I could overclock it to a reasonable speed and get just as good a performance as some X4's out there.

Being able to unlock it was just an added bonus, but was not a factor in my choosing it over and X4.

July 4, 2010 6:01:15 AM

Thnaks;

I'll try and let you know. :) 
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July 4, 2010 1:18:57 PM

As mentioned, there is no way to tell if it has a healthy fourth core or not. You can tell if you have a propus or deneb core by the stepping codes on the cpu. It will be CADAC or CACYC, the third letter indicates what core it was made from. A XXDXX is a Propus core and a XXCXX is Deneb core. No matter what core it is or if it can be unlocked or not they're great little chips and you'll love it.
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a c 190 K Overclocking
July 4, 2010 2:31:53 PM

435's run great as they are and if you successfully unlock the fourth core, its a bonus but it is a gamble as to whether you can unlock or not, mines unlocked, my Gf's isnt and I've never tried hers, but it runs fine for her uses as is.
good luck whatever you choose to go with man
Moto
July 6, 2010 6:59:48 AM

Hi,
I finally install all together, and use the "Unlock core" in bios
But this is what I see in CPU-Z

My core speed is only 803 MHZ...

Did I miss something in the BIOS configuration?
What does it mean, does my cpu is unlockable?

Thanks again.
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July 6, 2010 7:09:12 AM

Which processor did you get in the end?
You say you bought a chip, but I missed which one :p 
Moto
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July 6, 2010 10:57:04 AM

Looks good to me,says B35 with four cores active. The reason it says 800 mhz is because you have Cool 'n Quiet (CnQ) enabled. You can turn it off if you want, but I have mine enabled too now that I have a stable overclock. Here is mine http://valid.canardpc.com/show_oc.php?id=1270627
July 6, 2010 11:55:08 AM

Ok....
I'ts sounds great

For now I have the stock cooler..
Should I buy another cooler If i disable the CnQ ?
July 6, 2010 12:06:33 PM

BTW In other sites I saw that the core speed show somthing around 3917mhz....
Why in my case I see only 800 or in your case only 1000mhz...?

And one last thing;
For now i'm using the stock cooler ... - should I upgrade to another cooler?

Thanks
a b à CPUs
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July 6, 2010 1:07:07 PM

CnQ low power profile drops the CPU multiplier to x4.0. Since these are chips with locked multipliers, you are using the FSB to OC, thus, if you have a FSB of 250, you CnQ low power mode will drop you to 1000, as opposed to the 800 at stock speeds.

A good aftermarket air cooler is needed if you want to OC heavily, but the stock cooler will do for more mild applications.
July 6, 2010 1:22:51 PM

Thanks.

1. "if you have a FSB of 250" - who is decide what will be the FSB
2. can I change the FSB ?
3. Is it recommended to change the FSB?
4. When it's start to be dangerous to the CPU?
5. Does arctic Freezer 7 Pro Rev.2 Will be OK?
6. Is there any other change that i need to do except of disabling the CnQ? (install software \ another bios change?)

Thanks Alot.
Asher.
July 6, 2010 3:18:35 PM

One more Q.
When i Disabled the cnQ my HDD freaked out and start knocking his head...
What is wrong? is it the PSU (I'm using DH-153B)
Thanks
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July 6, 2010 6:22:52 PM

asher_pa said:
Thanks.

1. "if you have a FSB of 250" - who is decide what will be the FSB
2. can I change the FSB ?
3. Is it recommended to change the FSB?
4. When it's start to be dangerous to the CPU?
5. Does arctic Freezer 7 Pro Rev.2 Will be OK?
6. Is there any other change that i need to do except of disabling the CnQ? (install software \ another bios change?)

Thanks Alot.
Asher.


1. You set your FSB in your bios. It is known by other names, but it's stock value will be 200.
2. Yes, if you wish, since FSB*CPU multiplier = CPU frequency, and it is a locked multiplier (meaning it doesn't go any higher than stock level) the only way to OC this chip is through the FSB.
3. As mentioned, it is the only way to OC multiplier-locked chips, so as far as any OC can be recommended thus too is OCing through the FSB.
4. Know your thermal limits. research your chip and know how hot it can get before damage occurs, also know the max recommended voltages (as voltages at some point will need to be raised to stabilize your overclcok) Test your overclock settings for heat and stability with programs like Prime95 or Intel Burn Test.
5. That is a sufficient HSF for moderate overclocking.
6. Yes, but that is a really big question with no easy answer. You need to better understand the relationship your BIOS settings have to each other, and final performance. I don't have the time, but the internet is a really big place with lots of resources. BTW, you don't NEED to disable CnQ until you are hitting really high clock speeds. I have successfully run CnQ up to 3.9ghz without stability issues (simple does nothing at 4.0ghz), but with big power savings during idle or lowload conditions. How well CnQ will run on your chip and motherboard is up to you to find out, as its conditions are based on multiplier, voltages, and FSB, and it is hard to predict how well it will act without firsthand experience.
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July 6, 2010 6:23:27 PM

asher_pa said:
One more Q.
When i Disabled the cnQ my HDD freaked out and start knocking his head...
What is wrong? is it the PSU (I'm using DH-153B)
Thanks

I have never personally encountered what you are describing, sorry, I don't know what else to tell you.
Anonymous
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July 7, 2010 11:27:05 AM

Hello can one overclocker an AMD phenom x4?
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July 7, 2010 1:52:37 PM

^Yeah, but only the Phenom II X4 960T that has not been release to the costumers.
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July 7, 2010 3:19:08 PM

saint19 said:
^Yeah, but only the Phenom II X4 960T that has not been release to the costumers.

Word is, it will only go to OEM manufacturers now, not available for purchase on their own.
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July 7, 2010 3:28:02 PM

^That's why I say that has not been release to costumers yet.
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July 7, 2010 4:26:53 PM

Maybe Ebay will supply a few of them. Perhaps a cheap hold over for my CPU jones until bulldozer? har har
July 14, 2010 7:36:57 AM

Hi,
It's me again.. :) 
Everythig working but someone told me that i can open my L3 Too...
How can I do that?
a b K Overclocking
July 14, 2010 11:37:08 AM

asher_pa said:
Hi,
It's me again.. :) 
Everythig working but someone told me that i can open my L3 Too...
How can I do that?


There is only one L3 cache which is shared across all the cores. Unlocking a core does not unlock another L3 since there is no other L3 to unlock.
July 14, 2010 11:45:57 AM

What does it meaning ?
I see in CPU-Z that my L3 are grayed out .....
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a b K Overclocking
July 14, 2010 12:33:09 PM

asher_pa said:
What does it meaning ?
I see in CPU-Z that my L3 are grayed out .....

Some VERY earlier athlon II triples and quads were actually Phenom II chips with the L3 cache disabled. Those were only in the early days of the chip, and the odds of finding one now are very slim. That said, even if it is a phenom II chip with disabled L3 Cache, there isn't much hope for unlocking it, as often it will show up in CPU-Z, but not actually be functional. In other words, its pointless.
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July 15, 2010 2:08:25 AM

asher_pa said:
What does it meaning ?
I see in CPU-Z that my L3 are grayed out .....


It's because Athlon II doesn't have L3 cache, some early models did because they were disabled Phenom II processors, but most Athlon II are manufactured with no L3 cache on them. It's grayed out because it doesn't exist on the processor.
a b K Overclocking
July 15, 2010 11:41:59 AM

loneninja said:
It's because Athlon II doesn't have L3 cache, some early models did because they were disabled Phenom II processors, but most Athlon II are manufactured with no L3 cache on them. It's grayed out because it doesn't exist on the processor.


[:isamuelson]

I forgot the OP had an Athlon. I had assumed he had a Phenom. Teaches me to read the entire thread next time! :lol: 
June 25, 2012 9:44:34 PM

@asher_pa...that's the same thing i'm getting with an athlon II x3 455...after unlocking the 4th core, it won't go pass the 800MHz/per..same picture as what you've posted..tried tweaking the voltage for the cpu but i had no success. tried updating the BIOS and disabling Cool n' Quiet as advised, still negative..we might just need to accept the fact that we're not lucky as the others when we unlock the 4th core :cry: 
June 25, 2012 9:47:42 PM

@green300..i tried doing that in the BIOS but still no go..we have the same voltage listed by "asher_pa" and can't tweak the settings in the BIOS. any thoughts on this? thanks!
June 25, 2012 10:00:05 PM

@asher_pa...thanks for the reply on this issue sir but if you don't mind, can you give me the steps/one of the steps given by JofaMang on how you were able to resolve this issue coz i'm getting the same issue as well. thanks man!
June 25, 2012 10:37:05 PM

@JofaMang, thanks for that very informative resolution on this. just got a question though, isn't it changing the FSB is considered as OCing? some who purchased CPUs didn't have to change anything on their BIOS unlike what happened to US that we need to tweak settings there. Will it do harm to my system (i mean component wise). thanks!
June 25, 2012 10:49:54 PM

800MHz?? this doesn't change even if you're in FULL LOAD? what is the FSB that you used to solve the issue? 750 - 1000? thanks! just very eager to resolve this issue...thanks!!!
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