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  #1  
Old 08-12-19, 10:11 AM
FTLN FTLN is offline
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Angry Ryzen 3950X high idle clocks

Hi All,

I seem to have high idle clocks and high idle temps on Ryzen 3950X.
Lowest clock I have seen is 3ghz and idle temps are 35c-40c.

Fresh windows install November update
Latest AMD chipset drivers
Motherboard is B450 I Aorus Pro WiFi (dont laugh please, it does its job just fine, just very high vrm after a 1 hour render 115c )

No other software installed apart from portable versions of CPUz & HWInfo64

Any ideas ?

Also, I don't like to see my voltage hitting 1.5v whilst idle although under load it is much lower 1.17v to 1.2v depending on the core







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  #2  
Old 08-12-19, 11:30 AM
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Dark NighT Dark NighT is offline
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No question about this, this vrm isn't up to the task, it's only a 4 phase, the vrm heatsink barely has any surface area to properly cool it. for a 3rd gen 8 core like the 3700x or maybe 3800x this would just about be enough, but a 16 core needs a beefy vrm and this clearly isn't one.


If the temperature of vrm's is 115c, which is usually measured between the actual vrm chips, that means the chips themselves are even hotter and probably running out of spec at these temperatures, get a better board before the cpu gets killed with to much volts or the vrm blows up, also possibly killing the cpu.
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Old 08-12-19, 11:56 AM
tgrech tgrech is online now
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I'm sure you are but since you didn't mention, is that definitely latest BIOS too? I don't own a Ryzen but surely if the voltages are rising at idle something has gone quite wrong with power management and states? Have you also tried a BIOS settings reset?
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Old 08-12-19, 12:00 PM
FTLN FTLN is offline
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Quote:
Originally Posted by Dark NighT View Post
No question about this, this vrm isn't up to the task, it's only a 4 phase, the vrm heatsink barely has any surface area to properly cool it. for a 3rd gen 8 core like the 3700x or maybe 3800x this would just about be enough, but a 16 core needs a beefy vrm and this clearly isn't one.


If the temperature of vrm's is 115c, which is usually measured between the actual vrm chips, that means the chips themselves are even hotter and probably running out of spec at these temperatures, get a better board before the cpu gets killed with to much volts or the vrm blows up, also possibly killing the cpu.
But at idle VRM temps are very excellent, problem I have today is with high idle cpu temps 40c, CPU not clocking down below 3ghz and high idle voltage with peaks of 1.5v. Ambient temp in my office is around 18c.

IDLE SCREENSHOT




FULL LOAD SCREENSHOT

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  #5  
Old 08-12-19, 12:03 PM
tgrech tgrech is online now
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I wouldn't worry an insane amount about 115C temps, all these MOSFETs are tested at 150C for days and rated at 125C for safe stated lifetime use which is fairly safely under the actual damaging temps to account for low accuracy temp sensors. There is definitely some clear efficiency losses from current drain and such past 100C that gets quite stark past 125C but damage occurs much higher. To be honest I've heard more problems with the heatsinks themselves catching fire with all these fancy plastic shrouds they have nowadays.
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Old 08-12-19, 12:12 PM
FTLN FTLN is offline
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@Tgrech, bios is latest November release & set to default with XMP enabled on the RAM.
Actually when checking with cpuz only (hwinfo64 closed) the voltage seems to be stable so the high voltage I see at idle with hwinfo64 could be a side affect of it polling the status of the cores too quickly as per this article: https://www.techpowerup.com/257312/r...bserver-effect

But the above article does not explain the fact that I don't see my CPU clocking down below 3ghz.
The always above 3ghz clock speed could be the cause for the high idle temp opn the cpu.


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  #7  
Old 08-12-19, 12:18 PM
tgrech tgrech is online now
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It's not from the Minimum processor state settings in here or anything like that is it? I'd contact Gigabyte if you can't find any reason for it
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  #8  
Old 08-12-19, 12:37 PM
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Seems like you found the culprit, on AMD balanced profile and on 1usmus profile minimum cpu state is set to 99% ! ! !

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  #9  
Old 08-12-19, 01:39 PM
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IMHO that board is not able to handle the 3950x as it was not designed to run that high a CPU. You need something a bit beefier to be able to handle that many cores at full tilt if you want to see better clocks and temps.
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Old 08-12-19, 01:53 PM
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Quote:
Originally Posted by RobM View Post
IMHO that board is not able to handle the 3950x as it was not designed to run that high a CPU. You need something a bit beefier to be able to handle that many cores at full tilt if you want to see better clocks and temps.
Looks to me that it's handling a 140W load fine.
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