C# can't get CPU voltage and frequency with open hardware monitor

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I implemented the code that obtaining hardware sensors' readings using OpenHardwareMonitor. The code looks like this: using OpenHardwareMonitor.Hardware;namespace WindowsFormsApp3{ public - Pastebin.com[^]

It basically searches for the "name" of the sensor and returns the value if the sensor was found.
While I can obtain CPU PPT, CPU Load, TCL/TDIE Temperature, and Temperature of CCD1 and CCD2, by no means I can find the CPU voltage or CPU or CORE frequency, regardless of what "names" I searching for.

If you ever worked with Open Hardware Monitor or a similar library, I would truly appreciate it if you would tell me which "names" are used for readings that I'm looking for.

What I have tried:

Searched for:
VCore
CPU Voltage
Voltage #1 (as it is named in OHM software)
Procesor Voltage
etc.
The same with a frequency.
During my research (when I didn't know that it will be a problem) I came across the code/console app that could successfully obtain CCD frequency, but I no longer can find it.

Posted 10-Jan-22 13:07pm

John Bon Jovy

Updated 11-Jan-22 6:06am

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BillWoodruff 11-Jan-22 3:11am

Have you considered opening an issue on the GitHub site ?

0x01AA 11-Jan-22 8:25am

I assume you also test with the demo app. Anyway in case I start the app as normal user I don't see e.g. Frequency Values. But if I start the app as Admin, the Frequency Values will be displayed....
I hope it helps.

0x01AA 11-Jan-22 11:39am

Meanwhile I googled/read a lot about OpenHardwareMonitor and a lot of time people do not suggest it :(
Maybe it is more easy to get the values by WMI.

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0x01AA · Answer 1 · 2022-01-11T06:06:00

I searched a lot to get a solution with OpenHardwareMonitor but I also had no success. Furthermore in a lot of posts I found a remark that OpenHardwareMonitor is not a good tool, but this I can't jugde.

During these researches I found this easy solution with WMI which maybe can solve your request or at least a part of it:

C#

using System.Management;
// ...
foreach (var item in new ManagementObjectSearcher("Select * from Win32_Processor").Get())
{
   Log($"CurrentVoltage [V]: {(decimal.Parse(item["CurrentVoltage"].ToString()) /
       10).ToString()}");
   Log($"CurrentClockSpeed [GHz]: {(decimal.Parse(item["CurrentClockSpeed"].ToString()) /
       1000).ToString()}");
}

Thanks to @Richard-MacCutchan, here a version without useless conversion to/from string:

C#

foreach (var item in new ManagementObjectSearcher("Select * from Win32_Processor").Get())
{
   Log($"CurrentVoltage [V]: {(ushort)item["CurrentVoltage"] / 10.0}");
   Log($"CurrentClockSpeed [GHz]: {(uint)item["CurrentClockSpeed"] / 1000.0}");
}

[Edit]
One correction more after recognizing that ManagementObjectSearcher is IDisposable *grrr*

using (var managementObjectSearcher = new ManagementObjectSearcher("Select * from Win32_Processor"))
{
    foreach (var item in managementObjectSearcher.Get())
    {
        Log($"CurrentVoltage [V]: {(ushort)(item["CurrentVoltage"]) / 10.0}");
        Log($"CurrentClockSpeed [GHz]: {(uint)item["CurrentClockSpeed"] / 1000.0}");
    }
}

[/Edit]

All properties which are available above you find here: Win32_Processor class - Win32 apps | Microsoft Docs[^]