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Low +12v causing CPU instability ?

post #1 of 10
Thread Starter 
I've had some OC instability, Mu CPU (e7200) requires a lot of voltage.
Right now I'm running @ 3.4Ghz Vcore 1.41V
Today, someone from an other forum said it might be weak PSU and the vcore voltage that I chose isn't really at 1.41V

till today I never looked at this but now I saw in HWMonitor that my +12v is really low: 7.86V !!! ***?

BIOS shows the voltage is around 12V

BIOS shows me wrong CPU temp too so I don't know what to do or which app trust.

I have Seasonic 500W

So the problem is the CPU or the PSU?

Sorry for my bad English.
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post #2 of 10
Try using a multimeter to backprobe your PSU connections and check voltages that way.

If you don't understand backprobing, check this picture out.
http://www.agcoauto.com/content/imag...ng_circuit.jpg

The readings you get from your multimeter should tell you if your PSU is dying or not. Given the info you have provided, I would tend to think it is dying. The multimeter test should confirm this.
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post #3 of 10
Thread Starter 
I have multimeter, but not needle like these to backprobe, I'll try to improvise something
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post #4 of 10
Quote:
Originally Posted by wuTT View Post
I have multimeter, but not needle like these to backprobe, I'll try to improvise something
You can use any bare ended wire as well. Just so long as your meter probes make contact with the 12v connections on the PSU.

Software reading is generally never reliable. If your 12v was running at 7v, your rig wouldn't even turn on.
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post #5 of 10
Quote:
Originally Posted by wuTT View Post
I have multimeter, but not needle like these to backprobe, I'll try to improvise something
Altho somewhat dangerous (to your PSU and YOU!) you could use paperclips. It's not pretty, but if you have a very steady hand, and you don't mind a little electricity coursing thru your veins, it works! Good luck coming up with something.
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post #6 of 10
Thread Starter 
12v-12.2v on every connector that on the mobo (yellow ones)

I used 2 needles and plastic restraints
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post #7 of 10
usually the bios will display the correct temp, id stick to bios readings rather than software. good work on the bodging (Y)
     
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post #8 of 10
Quote:
Originally Posted by wuTT View Post
12v-12.2v on every connector that on the mobo (yellow ones)

I used 2 needles and plastic restraints
Nice work. Software readings of voltages are utterly worthless, ignore them.
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post #9 of 10
Software works, when it knows what monitoring chip you have and is calibrated right. However, this is rarely the case.

In general, if you see a really bizarre reading, you know the monitoring software is incorrect. As has been stated, your system could not even power up at the voltages being reported.
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post #10 of 10
Thread Starter 
Ok, so my PSU is fine. TY for the suggestions.
So what can cause my CPU to require that much voltage??
1.41V @ 3.4Ghz isn't normal at all..
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CPUMotherboardGraphicsRAM
Intel Dual Core E5700 Some old Asus Radeon HD4850 512Mb DDR3 2GB DDR2 
Hard DriveOptical DriveOSMonitor
WD 320GB Cheapest Sony drive Windows 7 SP1 LG 21.5" LED 1080p 
PowerCase
Seasonic 500W NZXT Alpha 
  hide details  
Reply
Main PC
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Dual Core E5700 Some old Asus Radeon HD4850 512Mb DDR3 2GB DDR2 
Hard DriveOptical DriveOSMonitor
WD 320GB Cheapest Sony drive Windows 7 SP1 LG 21.5" LED 1080p 
PowerCase
Seasonic 500W NZXT Alpha 
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Reply
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