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OC 955 BE on M4A79 Deluxe

post #1 of 18
Thread Starter 
I am trying to OC my phenom ii x4 955 to between 3.6-3.8 ghz. Weird thing is, I am trying the 3.6ghz on 1.4125v

It isn't stable.

I was reading through this guide:
http://www.overclockers.com/forums/s...d.php?t=596023

I think my issue is the NB isn't set high enough. Everything other than my cpu and ram is set to auto (on my M4A79 Deluxe). So, i was looking through, and I set my NB to 2400mhz....but...



Do I increase the CPU/NB voltage or the NB voltage to the 1.25v

Also, does anyone see anything else that should be adjusted?
-Note: The CPU/NB frequency isn't labeled in this right now. Again, the desired is 2400mhz.
Edited by Blast - 2/11/11 at 8:45pm
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post #2 of 18
set cpu-nb to 2600mhz and cpu-nb voltage to 1.3v. dont touch nb volt now. set vcore to 1.46v and cpu multi to 17.5 and fsb to 220.
try it out. run p95 for some time and see what happens?
    
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post #3 of 18
eh, just noticed that your ram is only 1066mhz, no need for 2600mhz cpu-nb then. use 2400mhz. voltage - 1.25v
    
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post #4 of 18
Thread Starter 
Alright. With the CPU-NB @ 1.25v and 2400mhz
The cpu at 3.6ghz at 1.3875v

The system is stable. However, I don't have a vcore option in my bios (unless it is named something different?) so when I set my fsb to 220, basically the computer shut down. When it turned back on, the graphics card lights were all lit and the fan blew at 100%. I had a black screen. System was basically stuck.

I fixed that by clearing the CMOS

Any thoughts on that?
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post #5 of 18
The cpu voltage is actually cpu-vcore here.
I think when you had increased the fsb to 220, your memory/ram also got overclocked which the system couldnt handle. Set a "dram frequency" less then or equal to 1066mhz.
    
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post #6 of 18
Thread Starter 
I'm not sure if I would want to set the vcore/cpu voltage that high. When I was at 1.4125v I was maxing out at 51*C
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post #7 of 18
I could be wrong but 2400 seems too high. Leave it at 2000. Just raise the multiplier and voltage accordingly.
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post #8 of 18
Thread Starter 
If I raise the multiplier and voltage and leave the CPU-NB alone it becomes unstable. Raising the CPU-NB to 2400mhz and 1.25v has stabilized it.
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post #9 of 18
Interesting. Is it proven stabalized or simply running?
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post #10 of 18
Thread Starter 
I have ran 20+ runs on Intel Burn, where previously it would crash before test 2. I will be running Prime95 for a good length of time [7-12 hours] once a finish a paper.
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