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Issues OCing unlocked Phenom II x2 3.1 BE

post #1 of 11
Thread Starter 
1. 4 cores are showing the bios, but only 3 on CPUID and Prime 95. No idea why.

2. I can only get this chip just under 3.4 on 2 different boards. Getting errors in Prime 95. I have put the reference clock at 230 and 14x and now its 224 and 15x, I tried 240 and 13.5 and these are the only stable levels I have found. The board maxes out around 245. (250 with 6 hour passed test. but seems that the cpu wont need that anyways)

I am guessing that my CPU is a pile of blah. Just wanted confirmation.
post #2 of 11
Hmm that is very strange try hitting the windows key and typing in DXDIAG and see how many cores it says you have
Unfortunately not all locked cores are stable sometimes they are locked down for a reason. Also some CPU's just don't OC well its very dependant on the chip. Also upload a cpuz validation just to see if it is detecting the processor correctly then we can go from there.
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post #3 of 11
Thread Starter 
post #4 of 11
Thread Starter 
And also, dxdiag was installing while I did the CPUz.

post #5 of 11
Okay so it is being detected correctly try this hit the windows key and type in msconfig and go to the boot tab click on the advanced button and on the number of processors try checking the box and select 4 if you do not have 4 as an option then make sure it is not checked reboot and see if that fixed it.

Also i just noticed you have an ASUS M4A88T-M keep in mind this is a 3+1 power phase and no MOSFET cooling and when unlocked your processor pulls 159 watts that is just asking for a dead MoBo so keep in mind if you do want to keep it unlocked there is a very very high chance it will blow a MOSFET and possibly kill the CPU along with the MoBo.
Edited by philhalo66 - 4/3/13 at 10:30am
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post #6 of 11
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Would the temperature be an issue, or is that a different way to fry a chip? Like... its reading 28C in the bios. So this has nothing to do with the cooler, this would fry other parts? Or would an aftermarket cooler save this issue?

I will check the msconfig when I get home in 20.
post #7 of 11
Quote:
Originally Posted by Teholdsedare View Post

Would the temperature be an issue, or is that a different way to fry a chip? Like... its reading 28C in the bios. So this has nothing to do with the cooler, this would fry other parts? Or would an aftermarket cooler save this issue?

I will check the msconfig when I get home in 20.



What happens is when you unlocked the cores or Overclock it pulls alot more power out of the MOSFETS(power delivery system) and if they are not designed for high wattage processors such as yours then they overheat and thats what kills them and i doubt an aftermarket cooler will be enough to cool a 3+1 system with such a high wattage processor. and thats 28C is either your processor or the ambient temperature in your case. If this is in fact your board then that would explain the poor OC


Take notice what i circled the numbered squares are the chokes they basically clean up the power for the processor and those are the phases. the yellow ones are the actual MOSFETS and those change the voltage from 12V to whatever the processor uses and the more wattage you pull from these the hotter they get and like i said thats what kills them.

But i also noticed there are 2 versions of the M4A88T one with 3+1 (above image) and one with 4+1. if you can tell me which one you have and if your is in fact the 4+1 phase then an aftermarket cooler will help significantly.

I am also going to link you to a thread that explains all of this in greater detail than i have http://www.overclock.net/t/943109/about-vrms-mosfets-motherboard-safety-with-125w-tdp-processors

This thread has a list of motherboards and their power phases and will have recommendations on what processor wattage to safely use http://www.overclock.net/t/946407/amd-motherboards-vrm-info-database
Edited by philhalo66 - 4/3/13 at 3:02pm
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post #8 of 11
Thread Starter 
Only 3 CPU show up in the msconfig option. I double checked the bios, 4th is enabled.

I am using this.

http://www.newegg.com/Product/Product.aspx?Item=N82E16835103065

M4A88T-M version.

as far as the chipset yellow circles, I have 5 pairs of those chips on my board.
post #9 of 11
Quote:
Originally Posted by Teholdsedare View Post

Only 3 CPU show up in the msconfig option. I double checked the bios, 4th is enabled.

I am using this.

http://www.newegg.com/Product/Product.aspx?Item=N82E16835103065

M4A88T-M version.

as far as the chipset yellow circles, I have 5 pairs of those chips on my board.

Okay did you try unchecking the processors box in msconfig? and that cooler is plenty for your processor. And this is good news you have the 4+1 power phase that means you can get aftermarket cooling for the MOSFETS i recomend these or these
Edited by philhalo66 - 4/3/13 at 3:46pm
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post #10 of 11
Thread Starter 
I just reinstalled windows 7 and everything showed up normally. I will look into those heat sinks.
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