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BCLK Jumping about

Nagasaki
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Posted

Is it normal for the BCLK to jump about on B550?

 

I have gone through 3 mobos over the years, X370, and two B550 boards and they all do it.

 

Anything from 95MHZ to about 99.8Mhz. Never just sits at 100. 

 

I have tried setting it to 100 manualy in the BIOS but it still moves about.

 

Mobo is an Asus Strix B550-F Gaming Wifi II if that helps.

 

Thanks

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Posted

Jumping around a little bit is expected behavior, the clock gen on those boards is far from perfect and spread spectrum is a thing. Going down to 95 though is outside of the range of acceptable values though, it should be bouncing around 99.6 to 99.9. 

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Posted

Do you use virtualisation? Even Windows Sandbox is enough to be enabled (does not have to be running).

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