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X570 FTW Power reporting accuracy

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Azureblood2
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2022/05/03 20:32:54 (permalink)
Hello,

I replaced my ASUS X570-i Gaming with a new X570 ftw and my current system is

CPU: AMD 5950x
Mem: Corsair 3600 MHz 16-18-18-36
GPU: EVGA 3080ti ULTRA XC3 HYBRID
PSU: Seasonic FOCUS PX 850w
Cooler: Arctic Freezer II 280 (AIO) / Arctic MX4 paste

On first boot with default settings I ran Cinebench R23 with HWiNFO open.  I Immediately noticed that the power reporting deviation was ~37%.  The CPU was pulling ~ 100W-120W as expected. Cinebench finished with a score of 26690, which is a bit higher than what I normally get with this CPU / Cooler at stock settings.

I then updated the BIOS and applied my normal settings. When I got to PBO I set it to Advanced / Use motherboard limits / + 200 MHz and booted into windows. 
 
When I ran Cinebench all cores immediately downclocked to 2.1GHz even though all of the core temps were under 40c. It very much looked like the CPU was being power limited.  Thinking it was a bug with the BIOS, I went into the BIOS and manually set the PBO power limits to what I had them on my old motherboard (400 / 300 / 300 / + 200MHz). 

I rebooted into Windows and ran Cinebench R23 again.  The all core frequency was ~4.2GHz, the CPU temps were at ~70c, and the final score was just over 27k.  All of this was expected based on my experience with this CPU / Cooler using the ASUS board.

What wasn't expected was the reported power draw of 90W, on the ASUS board with the same test / PBO settings this was being reported as 212W (and that seems more reasonable under the test conditions).  The reported power draw vs the expected power draw is really close to the deviation reported by HWiNFO....

Are there known issues with the power reporting on these boards?  Is it purposefully under-reporting?
post edited by Azureblood2 - 2022/05/03 20:34:30
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    Jomama22
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    Re: X570 FTW Power reporting accuracy 2022/05/04 07:13:45 (permalink)
    Azureblood2
    Hello,

    I replaced my ASUS X570-i Gaming with a new X570 ftw and my current system is

    CPU: AMD 5950x
    Mem: Corsair 3600 MHz 16-18-18-36
    GPU: EVGA 3080ti ULTRA XC3 HYBRID
    PSU: Seasonic FOCUS PX 850w
    Cooler: Arctic Freezer II 280 (AIO) / Arctic MX4 paste

    On first boot with default settings I ran Cinebench R23 with HWiNFO open.  I Immediately noticed that the power reporting deviation was ~37%.  The CPU was pulling ~ 100W-120W as expected. Cinebench finished with a score of 26690, which is a bit higher than what I normally get with this CPU / Cooler at stock settings.

    I then updated the BIOS and applied my normal settings. When I got to PBO I set it to Advanced / Use motherboard limits / + 200 MHz and booted into windows. 
     
    When I ran Cinebench all cores immediately downclocked to 2.1GHz even though all of the core temps were under 40c. It very much looked like the CPU was being power limited.  Thinking it was a bug with the BIOS, I went into the BIOS and manually set the PBO power limits to what I had them on my old motherboard (400 / 300 / 300 / + 200MHz). 

    I rebooted into Windows and ran Cinebench R23 again.  The all core frequency was ~4.2GHz, the CPU temps were at ~70c, and the final score was just over 27k.  All of this was expected based on my experience with this CPU / Cooler using the ASUS board.

    What wasn't expected was the reported power draw of 90W, on the ASUS board with the same test / PBO settings this was being reported as 212W (and that seems more reasonable under the test conditions).  The reported power draw vs the expected power draw is really close to the deviation reported by HWiNFO....

    Are there known issues with the power reporting on these boards?  Is it purposefully under-reporting?

    Sounds like the bios is under-reporting to squeeze more out of pbo, though I had thought that was fixed in 5000 series chips. Still very well could be and it may be aimed a 3000 series chips.

    It isn't an issue really. Not sure about the EVGA bios, but many x570 Asus bios' have an option to set how much of the power is reported to the chip. Testing I did showed no difference is performance.

    In hwinfo, there may be something along the lines of "VRM power" that would give you a better idea of what is actually being pulled.

    My associates code for discount at checkout: LXBKILTLID8VHVK
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    #2
    Jomama22
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    Re: X570 FTW Power reporting accuracy 2022/05/04 07:13:47 (permalink)
    Double posts for days...

    My associates code for discount at checkout: LXBKILTLID8VHVK
    <a href="https://www.evga.com/asso...8VHVK"><img src="https://www.evga.com/badg...ng"></a>
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    Azureblood2
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    Re: X570 FTW Power reporting accuracy 2022/05/04 17:25:32 (permalink)
    Definitely looks that way... my UPS is reporting a difference of 243W between idle and running Cinebench R23 while the CPU Package power is being reported as 103W.
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