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Safe Sustained Voltage for 3900X?

 
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post #1 of 3 (permalink) Old 10-30-2019, 04:09 PM - Thread Starter
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Safe Sustained Voltage for 3900X?

I'm currently running a 3900X on an Aorus Ultra X570. Using current BIOS and latest chipset drivers from AMD. Everything set to Auto in the BIOS except for PBO which I have disabled (or is disabled out of the box) and XMP.

When fully loading the CPU using 2 instances of Handbrake, each encoding a 1080/30 video, I am seeing boost speeds somewhere around 4100MHz across all cores. I am also seeing "Peak Core Voltage" in Ryzen Master showing approximately 1.37v under that condition. HWInfo seems to disagree showing peaks around 1.3v (SVI2 TFN).

Max sustained temp was 75*C while PPT, TDC, and EDC were all maxed.

Am I in the clear here or is there some tinkering I need to do?
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Last edited by MNiceGuy; 10-30-2019 at 04:21 PM.
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post #2 of 3 (permalink) Old 10-30-2019, 04:32 PM
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Not even in the ballpark of dangerous. Keep it under ~1.4v for a 24/7 voltage and you're fine.

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post #3 of 3 (permalink) Old 10-30-2019, 07:35 PM
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Quote: Originally Posted by MNiceGuy View Post
I'm currently running a 3900X on an Aorus Ultra X570. Using current BIOS and latest chipset drivers from AMD. Everything set to Auto in the BIOS except for PBO which I have disabled (or is disabled out of the box) and XMP.

When fully loading the CPU using 2 instances of Handbrake, each encoding a 1080/30 video, I am seeing boost speeds somewhere around 4100MHz across all cores. I am also seeing "Peak Core Voltage" in Ryzen Master showing approximately 1.37v under that condition. HWInfo seems to disagree showing peaks around 1.3v (SVI2 TFN).

Max sustained temp was 75*C while PPT, TDC, and EDC were all maxed.

Am I in the clear here or is there some tinkering I need to do?
Hi there @MNiceGuy , firstly I am impressed with the 4100mhz all core you get with the 3900X running default, My reason for saying this is that at default, which I do not actually run my all core boost is just about 4.0 ghz. Now going back to your voltages, what you could do is to manually overclock your cpu to 4.1 ghz and see how low you can go with the vcore before it fails. Then when you run stock / default set your vcore in the bios to a "-" off-set vcore to close to equal the voltage you find worked with the processor at 4.1ghz.

I've done the same with mine but running PBO maxxed out my cpu would go 4.16 to 4.19ghz all core at 1.275 to 1.29vcore with a -0.1125vcore off-set.

The application I found was the most accurate showing vcore was actually CPUz, so try runn that to check your true vcore during load.

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