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Auto voltage make my cpu reboot at most 5 min after entering Xp. At only 2.8ghz in auto cpu was at 1.4v, tryed Asus Ai NOS with 15% overclocking and i get 2.7ghz at 1.32v, after that tryed manual 3.0Ghz at 1.3375v and seem to work fine, my question is what happen when the voltage i put in bios is not enough for cpu load 100%? please help.
 

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Opensource-spice
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1,503 Posts
I run my 1.8ghz Conroe at 3.001Ghz on 1.25v but I wouldn't go any lower than that.

conclusion?
Conroes are extremely efficient.


enjoy your cooled CPU.

EDIT: jump your voltage down in steps and run a CPU stress program for about 30 minutes in between steps. When you get satisfied with your temps, run the test for a good hour or two, then overnight.

If the PC stays on, you're good. There's no danger in "under-volting" your CPU, your PC just won't start up and you'll need to manually reset the bios(which you should be able to do, just look up your motherboard on google and find an instruction manual).

You're in good shape.
 

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Your resident reaper...
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6,031 Posts
^
Overclocking is an fine art that takes time. It's not quick and easy like many are led to believe. Once your overclock boots into your OS fine, stress test it for at least half an hour. If that clears, keep going higher if you feel like it. Once you're at a speed you're satisfied with, do a stress test overnight. Around 8hours to be more exact. If you clear that, you're golden :thumb:

Prime95 and Orthos are popular ones. Either should would just fine, though I hear Prime95 is slightly more intense.
 

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The Hunter
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15,879 Posts
Since recently I've been using IntelBurnTest, which I really like as it brings everything to its knees. Great way to test system stability if you ask me. As for your question, too low voltage can make your system instable. Too high, and it gets instable as well due to heat, and noisy, if you have an auto fan.

IntelBurnTest README said:
IntelBurnTest v1.8
by AgentGOD
----------------------------
The original. All others are copycats.

Home Page: -=]Ultimate-Filez.com[=- {Revolution}
Donation : -=]Ultimate-Filez.com[=- {Revolution}

Description:
Linpack by Intel(R) is an extremely stressful program that will
put even the most powerful X86/X64 CPU in the world at its knees. Load temp
under Linpack will be up to 22*C higher than the competing software Prime95.
This program will make usage of Linpack easier and more practical.

Keep in mind, use this program at your own risk. By using this program, you
agree that neither I nor Intel shall be responsible for including, but not
limited to: burned up CPU, fried motherboard, spontaneous room temperature
increase, hair loss, or mental stress.

Compatibility:
Works with Intel(R) and AMD CPUs. Tested Intel(R) Core 2(tm) Quad
Q6600, Intel(R) Pentium(tm) III 550 MHz, AMD Athlon 64(tm) X2 4200+,
and AMD Opteron 165 (Working with AMD processors since v1.7).

Tested on Microsoft(R) Windows XP Professional SP2, XP Professional
X64 Edition SP2. Tested on Microsoft(R) Windows Vista(tm) X86/X64
by many awesome users like yourself ;)

Benefits of using Linpack:
1. More accurate than Prime95 Small FFTs/Blend.
2. Takes less time to tell if your CPU/RAM is unstable than Prime95 (usually
something like 8 minutes Linpack vs 40 hours under Prime95).
3. Use the same stress-testing engine that Intel uses to test their products
before they are packed and put on shelves for sale.

Benefits of using IntelBurnTest:
1. Simplifies usage of Linpack.
2. Direct output of results to the screen.
3. Simplifies the process of selecting a test size to use.
4. Better appearance.
There, no 24/h stable testing, I hate that overrated stuff :p
 

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Your resident reaper...
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6,031 Posts
Since recently I've been using IntelBurnTest, which I really like as it brings everything to its knees. Great way to test system stability if you ask me. As for your question, too low voltage can make your system instable. Too high, and it gets instable as well due to heat, and noisy, if you have an auto fan.



There, no 24/h stable testing, I hate that overrated stuff :p
Sweet. I can get rid of Prime95 now, nice find :thumb:
 
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