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 AMD Ryzen/ Threadripper OverClocking V1, Show off your OC results here!

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FatOftheLand
post Sep 24 2017, 06:58 PM

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Hi smile.gif
My rig: MSI B350 Tomahawk (7A34v18), Ryzen 1700 ,Thermalright Le Grand Macho RT, Corsair VENGEANCE LED 16GB (2x8GB) 3000MHz C15 ,Super Flower Golden Green HX Series, 80+ Gold, 550W

cpu: 3800mhz
vcore: 1.3v in the new bios (1.328v)
vsoc: 1.1v
mem: 2800mhz at 1.35v XMP1 (no boot issues finally but with the timings on auto)


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So...after running the CPU yesterday in prime95 for over an hour(max temps 74degrees celsius) it didn t crashed, however i ve noticed that the Bus speed was droping from time to time to 6mhz (values seen both in HW and CPU-Z). I ve tried to raise the cpu voltage a notch and had the same results. The bus speed drops also occurs in idle. I ve tried to go back to my previous settings (3600mhz at 1.184v) and it was also happening there. I have to mention i m using Core C6 State,Spread Spectrum,AMD Cool and Quiet disabled and tested both Ryzen Balanced Plan and Performance Plan in Windows. All the other voltages look stable. Has anyone experienced the same issues? Is this natural?


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FatOftheLand
post Sep 25 2017, 12:45 AM

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QUOTE(owikh84 @ Sep 24 2017, 05:01 PM)
Bus speed fluctuation on Ryzen is common.
On my C6E motherboard, bus speed fluctuates between 99.98-100.00 MHz.

Did you set your base speed manually? If not, do that set it 100.00.
Disable Spread Spectrum. This might minimize the BCLK fluctuation.
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No sir...i m not talking about a marginal fluctuation, i m talking about split second dips from 100mhz all the way to 6mhz as u can see the clocks in the 2nd photo. I have the Spread Spectrum disabled and i haven t been messing with the BCLK. For instance ,if i m stress testing in Prime95 and start opening other programs like ryzen master ,task manager ,cpu-z etc , those huge 6mhz BCLK dips occur.


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