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Did I kill my AMD x3 455

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July 30, 2010 12:19:05 PM

I was trying to unlock the 4th core on my amd x3 455 using an msi 870-g45 motherboard. After initial attempts proved to be unstable I tried marginally increasing power to the cpu as several people on this forum suggested. I increased it initially to 1.35 volts and it seemed a bit more stable so i tried 1.43ish. I also increased the cpu-nb voltage to 1.4


The computer no longer posts.
ive tried reseting the cmos both with jumpers and by pulling the battery.



The question is, is there a way to fix this.


and if not, should i be looking to replace my motherboard my cpu or both. and is there a good way to test to see where the problem is before i spend more.

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July 30, 2010 12:49:59 PM

When you say it does not post, do you get a signal on the monitor ?

If there is nothing, I would remove the battery, keep the pc unplugged, remove the cpu and wait an hour, try again and if it still doesn't post... then worry.

I would try another cpu (if you have any spares) but it doesn't sound like you did anything wrong. (to my knowledge at least)
July 30, 2010 2:01:55 PM

No signal on the moniter at all, hell my keyboard lights dont even flash. The internal lights, case and cpu fans are all on but other than that it just sits there doing nothing.

posting is when it beeps and you see the basic diagnostics on screen right?

also will the motherboard post without a cpu in it? what would removing that and reinstalling it accomplish?
not that im not willing to try it at this point ill try anything.

and no of course i dont have any spares (i would have tried that allready) was using an old 939 motherboard before this
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July 30, 2010 2:37:13 PM

i dont play with nb voltage atall, the computer needs the cpu to load the bios, unplug power + batteryfor an hour, leavethe battery out then try to post, interchanging ram is also a good thing to try
July 30, 2010 2:56:01 PM

If you only have amd x3 455,and you tried to unlock the 4th core,well you cant,simply its because its not a quad core,yours is triple core.Only the quad core can unlock the 4th core not the triple.If you want amd quad core,you will have to upgrade to amd x4 cpu.
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July 30, 2010 3:15:44 PM

Antonythegamer said:
If you only have amd x3 455,and you tried to unlock the 4th core,well you cant,simply its because its not a quad core,yours is triple core.Only the quad core can unlock the 4th core not the triple.If you want amd quad core,you will have to upgrade to amd x4 cpu.


Not at all true.

There actually plenty of AMD cpu's that are quad cores but are labeled as dual and tri core cpu's.

Athlon ii x3, Phenom II x2, and Phenom II x3's at all current cpu's from AMD that are quad core but been labeled as such. (the Athlon ii x2 is a true dual core and not a quad core with 2 cores disabled unlike the Phenom II x2. So there no way to unlock the Athlon II x2.)

Now you need some unlocking know how though the bios or get a motherboard that has the the ability to automatically do so (something like asus core unlocker http://event.asus.com/mb/2010/M4A89/).


Now it doesn't mean all tri and dual cores can unlock to quad core, but there a decent chance it will. Just look around the web. You find plenty of people have done so. ;) 
July 30, 2010 3:29:27 PM

Ill try leaving the battery out for a full day, i have plans for the next 24 hours.

If this fails to fix the problem is there anything else i should try?
im pretty sure its not the memory i didn't touch those settings at all, and it was booting fine till I started messing with the core unlock.

and if there isnt anything i can do whats your best guess as to what i fried.
i can replace both the motherboard and cpu but id rather not have to

Is it even possible to fry a break/fry a cpu with 1.44 volts? or did messing with the northbridge/cpu voltage probably bone me here?
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July 31, 2010 7:59:35 AM

Raising the CPU NB voltage to 1.4 might have caused damage, but I know 1.45 from the cpu itself won't damage it. Mine has run at that since December(and yes it's an Athlon II).
August 1, 2010 4:43:14 AM

yeah i still cant even get beeps. I think im going to go with the hypothesis that i cooked my northbridge guess im buying a new motherboard. hopefully thats the only thing that got damaged.
December 9, 2010 8:36:51 AM

Hi valen0619 (or any other sympathetic soul)

I have the identical problem to you. I tried the unlocker switch on the mainboard (Asus M4A89 GTDPRO/USB3), and half way through loading the OS, the computer died. No monitor signal, nothing. The mainboard has power.

I have tried removing the C-MOS battery with no result. Did you find any answers, or has my use of the unlocker cooked the mainboard or the cpu (AMD black edition quad) for good?

John Price :fou: 
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December 9, 2010 10:03:34 AM

valen0619 said:
yeah i still cant even get beeps. I think im going to go with the hypothesis that i cooked my northbridge guess im buying a new motherboard. hopefully thats the only thing that got damaged.


You most likely fried the memory controller on the CPU with 1.4v to the NB/IMC -- not the motherboard.


bertram_94 said:
Hi valen0619 (or any other sympathetic soul)

I have the identical problem to you. I tried the unlocker switch on the mainboard (Asus M4A89 GTDPRO/USB3), and half way through loading the OS, the computer died. No monitor signal, nothing. The mainboard has power.

I have tried removing the C-MOS battery with no result. Did you find any answers, or has my use of the unlocker cooked the mainboard or the cpu (AMD black edition quad) for good?

John Price :fou: 


I have serious doubts as to the unlocker switch cooking your motherboard. I'd reset all and load optimized defaults.

December 9, 2010 10:41:42 AM

Hi

Thanks for your replies.

>>I'd reset all and load optimized defaults.

I have tried taking the battery out for several hours. I am not sure of any other way of resetting, as the computer shows no sign of life whatever on power up. The failure occurred half way through loading the OS immediately after my ill-starred decision to try the unlocker switch and I can think of no other cause.

Thanks anyway

John Price
December 10, 2010 3:16:40 AM

Try removing the ram as well and or video card and attempt to boot, just to see if you get any complaints from the board. Are you sure your PSU is good?
March 9, 2011 3:55:55 PM

:pfff:  To complete this sad tale, Wisecracker was right. Switching on the core unlocker fried the cpu. Still, Asus do warn that it may not be safe, and I have to say that this is such a great m/board that I am still happy with it even amid the ruins of my much prized cpu (now replaced and working fine).
March 9, 2011 4:52:43 PM

bertram_94 said:
Hi

Thanks for your replies.

>>I'd reset all and load optimized defaults.

I have tried taking the battery out for several hours. I am not sure of any other way of resetting, as the computer shows no sign of life whatever on power up. The failure occurred half way through loading the OS immediately after my ill-starred decision to try the unlocker switch and I can think of no other cause.

Thanks anyway

John Price


Your name is John Price...Sure it's not Captain John Price are you? Somebody will understand :D  :D  :D  :D 
May 30, 2011 5:53:01 PM

I understand. Just call me Soap. So what I'm hearing is that trying to unlock the 4th core will probably not be a smart idea if I am on a tight budget right?
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May 31, 2011 12:15:05 PM

bertram_94 said:
:pfff:  To complete this sad tale, Wisecracker was right. Switching on the core unlocker fried the cpu. Still, Asus do warn that it may not be safe, and I have to say that this is such a great m/board that I am still happy with it even amid the ruins of my much prized cpu (now replaced and working fine).


Overclocking the IMC/NB is not a bad thing BUT don't raise the NB volts as high as the CPU volts.

Stock NB volts is around 1.15v. From 2000MHz to 2400MHz should not require additional voltage though 1.1875v may add a touch of stability. You may use 1.2v to 1.25v to get in the 2600MHz to 2800MHz range. Some enthusiasts have gone beyond 3000MHz IMC/NB with 1.3v but that is a too high for me.

And regretfully, you found out what happens at 1.4v NB volts.


SFESniper said:
I understand. Just call me Soap. So what I'm hearing is that trying to unlock the 4th core will probably not be a smart idea if I am on a tight budget right?


Core un-locking is not really an issue. Either it works --- or it doesn't. An unlocked core may run stable with no voltage increase, or a slight bump in volts may add stability. Just be careful with your volts, and monitor your temps and stability.

And if you have an issue you should be able to reset the CMOS without difficulty.



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