Help with overclocking 8320e past 1.32V

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M

MylegsareOK

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May 10, 2017
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I've been at this for days, but I just can't figure it out.

Specs: FX 8320e

Corsair H80i

gigabyte 970 gaming sli

corsair vengeance 16Gb(2x8GB) 2400Mhz running at 1866Mhz

EVGA 1070 FTW

EVGA 600W B1 80+ bronze

OS: Windows 10 home creator's update

During stress testing if I have vcore set to anything over 1.32V once the test has been running for about 20 minutes the vcore will drop to about 0.98V and the CPU will downclock to 1.4GHz, it will then jump back up to the proper speed and voltage. The longer the test runs, the shorter the interval between the drops. It shouldn't be an issue with temps as the CPU never goes past 50C and all the motherboard temps never go past 55C.

I've disabled all of the unnecessary CPU features in the BIOS(turbo, cool&quiet, etc.) and enabled HPC, I've tried changing the LLC settings, but the drops still happen regardless of what the LLC is set to. I've set windows power settings to high performance and disabled fast boot.

I've managed to get a pretty stable OC at 4.0GHz and 1.32V but would like to push it further.

Is this purely a hardware issue with either my motherboard or PSU, or am I doing something wrong?

Edit: Forgot to mention I got this CPU second hand from a friend who was running it at 4.6GHz 1.4V without issue
 
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amtseung

amtseung

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Jan 28, 2014
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No 970 chipset motherboard has good enough VRM headroom to overclock an FX octacore very far, if at all. Kicking up LLC settings a notch only makes things worse.

I suspect you've hit the thermal and/or voltage and/or amperage limit of your motherboard VRM's, a.k.a. VRM throttling. Either get yourself a beefy AF, top of the line 990FX motherboard like the ASRock Fatal1ty 990FX Professional or ASUS Sabertooth 990FX, or switch to Ryzen.

Your friend probably has a motherboard with superior power phase design and VRM's.

If I sold you my FX8320 that I overclocked to 5.2ghz on phase change cooling (mine actually burnt to a crisp at 5.1ghz, but let it serve as an example), does that mean you can also run it at 5.2ghz on inferior hardware?
 
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0ldsch00l

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May 9, 2017
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Ohh rly? I own a 970 gaming that OCs better then any 12 phase crosshair kitty or aholerock ;)

And it doesnt nannythrottle, quads six and octa cores all ran fine at more then max TDP
 
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M

MylegsareOK

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May 10, 2017
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510


The board my friend was using was an MSI 970 gaming, it had an 8+2 power phase, same as the board I'm using, so it's probably just a problem with my board's VRMs. Too bad I'ts out of warranty :( time to start saving for ryzen I guess. At least I've got it running at 4GHz without issue, not bad for a CPU I got for $20.


I've actually killed 2 8350s trying to push them to 5GHz, maybe I should stop trying to OC so far, but it's so addicting.
 
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0ldsch00l

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You killed 2 8350s? How? I never killed a chip OCing, fried a VRM once on a flimsy UD3 early revision but a CPU? never, last vishera before this one was a cheap used 6300 I got on ebay, did 4.6 and even overvolted past 1.55 never died, maybe it killed lifespan a bit running a year overvolted but it was 100% stable
 
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M

MylegsareOK

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May 10, 2017
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I had the vrms blow up and they took the CPU with them, it was before I knew about power phases and I was just recklessly increasing multipliers and voltage until it crashed, I later found out the boards I was using were only 4+1
 
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0ldsch00l

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May 9, 2017
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4 phase?!?!?!!?

I had a rare Sapphire 790x board I got in europe once, tried OCing a PII 940 black, wouldnt budge 100 mhz even, but it didnt fry with 4 phase, guess I didnt crank it like a maniac, it didnt even have a heatsink on VRM
 
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0ldsch00l

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May 9, 2017
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Just lack of experience thats all, WHen I was young I jolted 2 Tbirds with static.... yeah by trying to do pencil trick on top of a pack of cigarettes, the celphane paper has lotsa static..... little did I know.... ;)
 
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