Core Voltage not remaining as I set it in the BIOS?

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IHazABone

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Nov 7, 2013
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This is my first experience with overclocking (CPU's), and I'm running an FX-8350 on an MSI 970A-G43 (bad board, I know). Everything is fine and dandy (minus instability above 4.5 GHz for now), except when I change the CPU voltage in the BIOS, it does not change in CPU-Z. I've been told that raising the voltage slightly can improve stability. So I went from 1.42V to 1.435V. However, it's not changing anything as it seems, and CPU-Z shows it bouncing between 1.408V, 1.424V, and 1.416V. What am I doing wrong, if anything? All the CPU features and parameters are disabled, so I wouldn't think that anything would mess with it. And any tips or warnings would be appreciated, too! :)

http://valid.canardpc.com/2vawks
 
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IHazABone

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Nov 7, 2013
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After looking around, it seems that most stable OC's are 200 MHz FSB and the multiplier is adjusted from there. Most of them also had CPU voltages of > 1.43V, which I seem unable to change.

Adjusted: http://valid.canardpc.com/rt48rv

Under load, it goes down to 1.38V. I believe this is what is referred to as Vdroop, correct? My BIOS/mobo does not have LLC or Vdroop options, so what should I do to prevent or fix this? The crashes only seem to happen once the stress level pushes the voltage under 1.4, then 100% of the time at 1.38, no matter what is pushing it there, whether it be rendering, gaming, or stress-testing applications.
 
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IHazABone

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Nov 7, 2013
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Does anyone know what the problem is or how to get by it? I have no stability. I can idle fine, but it crashes after about 3 minutes on prime95's small ffT with 2 threads, which I could run indefinitely at stock. The highest stable clock I can manage is 4.3 GHz.
 
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IHazABone

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Nov 7, 2013
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It's a Seasonic G-Series 650W Modular 80+ Gold, and I ran perfectly fine on a generic 460W for over a year, so I don't think it's that. I'm at 4.4 GHz now, and about 80% stable. prime95 crashes it after a few minutes, but for now I don't absolutely need perfect stability - though I will try to get there. I ran a 16K full AA raycasting/reflection render for 15000 frames (about 7 hours) at 100% CPU and around 50% GPU usage and it remained perfectly fine through that.
But that's not any indicator. It has been suggested that my motherboard's VRM just isn't going to let me go any higher, but that seems unlikely seeing as the settings to up to insane settings like 1.65V.
Looking around a little, the general consensus for 4.6GHz is around 1.43-1.45V. Another thing: it stopped crashing when it got to 1.38V, but now it goes down to even 1.33V under extreme load. Could this be a problem? That seems like rather high Vdroop, and I have no LLC to help that.
 
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