Greetings,I recently got Phenom II X2 550.On overclocking forums,it is a proven that it is actualy a Phenom II X4. I went into bios and unlocked all cores.After saving changes,CPU is now recognized as Phenom II X4 B55.Problem occurs after Windows get's loaded.Just before it enters desktop,I get BSOD with error something like this: fault_page_in_non_paged_area and then after that something is written in the ().I think error is not the same always,but it always containts something with "page" in it.I also tried to increase voltage,and once it managed to load Windows fully and I was on desktop,but after I clicked on folder browser,again BSOD showed up.I then went into bios and left it unlocked,but disabled two cores.It was still showing up as X4 B55 but if I went into Speedfan,it finds two cores as it should. Now I unlocked third core,and it appears stable.How do I make fourth core to work?
Problem unlocking Phenom II X2 550
- Thread starter kapul4
- Start date
- Dec 22, 2014
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There is a reason your chip was sold as a Phenom II X2 and not an X4. While they all come from the same die, the X2 had 2 cores that did not pass AMD's testing and were therefore disabled. Sometimes its a very minor issue and so unlocking them works fine, but there are no guarantees. Folks joke about "winning the silicon lottery", and in this case you did not win. The best you will get is 3 cores if thats all that works as stable.
ajhockey3
Reputable
- Mar 7, 2015
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He said he was able to unlock it at x4 I'm assuming he didn't say it was stable? Its very rare an X2 will unlock to a X4. Most of the ones I got back in the day were X3's. What I did was just pump a stupid amount of voltage and down the clock speeds a tad and just downed the voltage little by little until I found a sweet spot.
- Dec 22, 2014
- 32,729
- 2,812
- 113,640
Maybe he unlocked it but not sure how much testing he did with it. The types of errors and issues you are describing are exactly what a bad core would do. Increasing the voltage only masks the problem, and obviously it didn't last very long. You can keep trying but you'll sooner burn out the chip than make it permanently stable.
Most unlock because they sold more of them than they had bad chips. Both my friend and I got them and both unlocked just fine. I've been running mine at 3.6GHz at up to 1.4875V 24/7for 5 years with no issues at all. Gaming, prime 95, and folding at home situations where it's at full load for days. You do need a good cooler though. Has to stay under 60C at ful load preferably 55
You can give it more voltage and test or turn down clocks. Just like overclocking slowly step up voltage and watch temps. If you can't get it stable on your system without going to 1.5V then forget it and be happy with 3 cores. Increasing voltage doesn't "mask" the problem or Fail "soon" however it is used and old so if it's been run hard it won't be great for it. A very real reason for these to be rejected as X4s was because they wouldn't hit the TDP because they would need more voltage/power to perform.
You can give it more voltage and test or turn down clocks. Just like overclocking slowly step up voltage and watch temps. If you can't get it stable on your system without going to 1.5V then forget it and be happy with 3 cores. Increasing voltage doesn't "mask" the problem or Fail "soon" however it is used and old so if it's been run hard it won't be great for it. A very real reason for these to be rejected as X4s was because they wouldn't hit the TDP because they would need more voltage/power to perform.
maddogfargo
Splendid
- Nov 28, 2006
- 3,344
- 8
- 22,965
There are never any guarantees when attempting core count unlocks. It either works or it doesn't.
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