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Can't get CPU Vcore setting to stick

Tags:
  • Core
  • CPUs
  • BIOS
Last response: in Overclocking
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a c 417 à CPUs
September 22, 2014 12:53:27 PM

I'm sure I must be missing something simple here. I have been trying to set my CPU core voltage up from the stock value of 1.3375v. But it won't stay. (See my sig below for my system)

I increased the CPU Vcore set in BIOS (to 1.4v. )
I left the NB Core at stock (1.75v).
I have the following power saving features disabled:
-Core Performance Boost (Turbo)
-Cool & Quiet
-Core C6 State
-HPC Mode
-APM

I save and exit BIOS and boot to Win7x64 only to find that HWinfo, Core Temp, and AMD Overdrive all show the CPU core voltage back at the stock value of 1.3375v. Oddly, CPU-Z shows it at 1.392v.
As a result, I can't get very far with multiplier increases w/o failing stress testing.

Is there a setting somewhere in my board's BIOS that I should be changing in order to get the core voltage to 'stick'?

More about : cpu vcore setting stick

a c 94 à CPUs
September 22, 2014 1:18:56 PM

hi, @clutchc, have you tried to increase LLC a bit?
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a c 417 à CPUs
September 22, 2014 1:50:31 PM

chris987 said:
hi, @clutchc, have you tried to increase LLC a bit?


If you mean Load Line Calibration, yes. But the problem isn't that I can't get a stable OC...not yet, anyway. The problem is that I can't get the BIOS vcore setting to stick once I get into Win7. If I go back to BIOS, the vcore is right where I left it. Soon as I boot to Win7, it is back at 1.3375v.
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a c 94 à CPUs
September 22, 2014 2:14:50 PM

along side with voltage does cpu speed also drops? even on high performance windows power plan ensure cpu power management always 100% a stubborn cpu maybe? i wouldnt expect throatlling for any reason with such hardware, i suppose you have capable cooling too!?
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a c 417 à CPUs
September 22, 2014 3:05:51 PM

Before I disabled everything listed above, I was getting throttling down to 1400MHZ when temps reached mid 50Cs. (!!?) But since I disabled all of the above, that hasn't happened. But the only way I can get the vcore to run at more than stock is to set it in AOD. But even using AOD I can't save the setting for the next reboot. It is always back to stock vcore on the next boot.

I am using a Corsair C60 AIO cooler.

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a c 94 à CPUs
September 24, 2014 11:12:39 AM

have you tried running on offset voltage rather than fixed?
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a c 417 à CPUs
September 24, 2014 11:52:01 AM

chris987 said:
have you tried running on offset voltage rather than fixed?


No, I haven't I can't even find the offset voltage option in BIOS. And in AOD everything except CPU VID and NB VID is greyed out. Besides, how would that help me to get my voltage changes to stick?



As you can see in the above pics, my voltage in BIOS is not reflected in what AOD (and other apps) reports.
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a c 94 à CPUs
September 24, 2014 12:38:16 PM

well offset voltage wont get it to stick but at least we would see if you could pull out any stable overclocking! after a bit of a digging i found quite a few reports of missing(greyed out) advanced bios option on UEFI and throttling on mid 50s. here is one. it has to do with rev3.0

http://www.overclock.net/t/1354110/amd-fx8350-overclock...

is there any later bios version to flash? also i've read somewhere about ctrl + F1 to bring up some aditional option in bios! does this stand!?
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a c 417 à CPUs
September 24, 2014 12:49:42 PM

All the posts I've read on that thread so far sound like they are talking about my experience exactly! Apparently even rev 4 of the board didn't fix it. I may be offering this board up for resale...

I'll first try that HPC suggestion.
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a c 94 à CPUs
September 24, 2014 12:52:50 PM

you're welcome! this is quite challenging!
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a c 417 à CPUs
September 24, 2014 1:02:01 PM

chris987 said:
you're welcome! this is quite challenging!


I've never even heard of HPC mode before. Apparently it stands for High Performance Computing (mode). Unlike the above thread's suggestion of turning it off, mine was off by default. I enabled it and rebooted. Now my vcore is sticking!
Thank you for that.
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a c 94 à CPUs
September 24, 2014 1:15:22 PM

you were right from the beggining after all, we did miss something simple!:) 
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a c 417 à CPUs
September 24, 2014 2:51:45 PM

Well, now I AM confused. I got the voltage to stick once. But now I can't do it again. It's back to its default of 1.3375v. I followed the instructions in the thread to a T...
"make sure all your power saving features are turned off.
set your bios to the oc you want to try with hpc mode disabled. once it passes stress test say for 1 min, go back into the bios and turn on hpc mode only reboot and stress test.

any time you change a setting in the bios turn hpc mode off. change setting and boot. then restart and turn hpc mode on. then stress test
."

This is a pain in the ass. Why even have such an option?
I had a stable OC at 4.5 Ghz/1.4v, went to BIOS and saved a profile, rebooted to BIOS, checked that all was the same, booted to Win7, and the vcore is back to default. Now no matter how I perform the HPC ritual, I can't get it to stick again. Grrr....
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a c 94 à CPUs
September 25, 2014 5:40:07 AM

oh man, in that case i cant think of anything else other than a UEFI bios glitch - fault!:pfff: 
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