Unstable zen2 CPU temperature on X470 Taichi

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   Hi there,

A-Tuning's temperature(Tctl) deviates widely from Ryzen Master's, so the fan of Wraith 
Prism growls accordingly on loaded status. Pretty much annoying.

I've attached the screen shot of Ryzen Master and HWiNFO64 instead on thermally stable 
situation.

HWiNFO64 shows two temperatures, CPU(Tctl/Tdie) and CPU. These two are equal to the 
options on Fan-Tanstic Tuning, I guess. Both change almost in the same over a range of 
10 degree, while Ryzen Master's CPU temperature keeps 40 degree within plus or minus
1 degree all this time.
I've checked to see if all these three temperatures go up beyond 90 degree by OCCT 
loading.

I don't see any relation to these temperature deviations on idle status, neither on 
CPU load nor on my wattmeter. This phenomenon was not altered by the latest BIOS 
update.

My questions are below.

Is this a normal behaviour, a sensor malfunction or an unfixed bug?
Can x470 taichi modulate CPU fan on Ryzen Master's temperature? (in the future, maybe)
How can I try constant speed for fan rotation on x470 taichi?

Regards,

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iichiko25 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 08 Aug 2019 Location: Japan Status: Offline Points: 4	Post Options Post Reply Quote iichiko25 Report Post Thanks(0) Quote Reply Topic: Unstable zen2 CPU temperature on X470 Taichi Posted: 08 Aug 2019 at 12:44pm
	Hi there, A-Tuning's temperature(Tctl) deviates widely from Ryzen Master's, so the fan of Wraith Prism growls accordingly on loaded status. Pretty much annoying. I've attached the screen shot of Ryzen Master and HWiNFO64 instead on thermally stable situation. HWiNFO64 shows two temperatures, CPU(Tctl/Tdie) and CPU. These two are equal to the options on Fan-Tanstic Tuning, I guess. Both change almost in the same over a range of 10 degree, while Ryzen Master's CPU temperature keeps 40 degree within plus or minus 1 degree all this time. I've checked to see if all these three temperatures go up beyond 90 degree by OCCT loading. I don't see any relation to these temperature deviations on idle status, neither on CPU load nor on my wattmeter. This phenomenon was not altered by the latest BIOS update. My questions are below. Is this a normal behaviour, a sensor malfunction or an unfixed bug? Can x470 taichi modulate CPU fan on Ryzen Master's temperature? (in the future, maybe) How can I try constant speed for fan rotation on x470 taichi? Regards,
	X470 Taichi BIOS3.60 3700X WraithPrism W4U3200CM-16G DDR4-3200 16Gx2 ZT-T16610F-10L Win10Pro 1903 AMD Ryzen Balanced ChipsetDriver1.7.29.115 RyzenMaster2.0.1.1233 A-Tuning3.0.203 HWiNFO64 v.6.10-3890

iichiko25 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 08 Aug 2019 Location: Japan Status: Offline Points: 4	Post Options Post Reply Quote iichiko25 Report Post Thanks(0) Quote Reply Posted: 03 Sep 2019 at 1:58pm
	Hello again, I've attached the screen shot of medium load status during H.265 encoding by Handbrake. CPU load and power consumption are fairly high but don't reach 100%. This is the typical fan growling situation. CPU temperature is 76-80 deg on Ryzen Master all this time. The deviation of Tctl, which I've shown on idle status in my last post, is kept on this higher CPU load. CPU fan rotation (pink chart) shows good respondency to Tctl (black chart). However, Tctl appears to be irrelevant to CPU Package Power (blue chart). That is electrically and thermally impossible. This mismatch results in fan rotation speed going up unnecessarily to nearly 3,000 rpm and down rapidly. This is what I call "growling". 37 times in 559 seconds, it seems somewhat periodic. I want to control my CPU fan, like I calm down my stupid dog. So I suggest fan rotation speed should be controlled by Ryzen Master's temperature or should be fixed constant. Regards,
	X470 Taichi BIOS3.60 3700X WraithPrism W4U3200CM-16G DDR4-3200 16Gx2 ZT-T16610F-10L Win10Pro 1903 AMD Ryzen Balanced ChipsetDriver1.7.29.115 RyzenMaster2.0.1.1233 A-Tuning3.0.203 HWiNFO64 v.6.10-3890