Ryzen 3000 users report high voltages with idle cpu
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With AMD's third-generation Ryzen processors in the hands of enthusiastic PC users, many of them are reporting suspiciously high voltages when the processors are idle.
Monitoring tools do not recognize Ryzen 3000 voltages well
AMD investigated this phenomenon and stated that it was not a problem. Apparently, most modern CPU monitoring utilities cause what is known as The Observer Effect "the observer effect", where the process of measuring the processor load itself causes a load on the processor.
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In the case of the recently released Ryzen 3000 processors, the various monitoring tools (CPU-z for example) seem to be probing the load on each processor core by sending instructions at a high speed, sending them a 20 ms workload each 200 ms. This makes the embedded firmware of the processor think that the cores are being subjected to a workload, and it responds by increasing the clock speeds, and proportionally the voltages of all the CPU cores. The monitoring software polls each core of the CPU, and thus the core voltages rise through the chip.
"We have found that many popular monitoring tools are quite aggressive in the way they monitor the behavior of a core. Some of them wake up all the cores of the system for 20 ms, and they do it every 200 ms. From a processor firmware perspective, this is interpreted as a workload that requires sustained performance of the core or cores. The firmware is designed to respond to this pattern by driving: higher clocks, higher voltages, ”said Robert Hallock, AMD chief marketing officer for processors.
For this reason, current monitoring tools are not 100% reliable in determining the voltage at which a processor works when idle, at least in the case of Ryzen 3000.
To view idle voltages, AMD recommends that you install the latest version of Chipset drivers and enable Ryzen Balanced Power Plan in Windows Power Plan. As they have shown with the capture they shared above.
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