X399 FATALITY, TR 1900x CPU idle temp 71°C

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   I am testing a new build, still not in the case. I have x399 fatality & 1900x TR CPU with aircooler with two fans (arctic).

I did not install an OS yet, and when checking the temperature in the BIOS, CPU is at 69 to 73°c range (increases gradually by 0.5 every few sec).

Motherborad temp at 27°, +1.5 from room temp.

VR temp at 30°C.

I have changed the thermal paste twice (arctic mx-4)

Bois ver: 3.80

Any help/suggestion? 

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Nash Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 09 Feb 2022 Status: Offline Points: 65	Post Options Post Reply Quote Nash Report Post Thanks(0) Quote Reply Topic: X399 FATALITY, TR 1900x CPU idle temp 71°C Posted: 09 Feb 2022 at 8:27am
	I am testing a new build, still not in the case. I have x399 fatality & 1900x TR CPU with aircooler with two fans (arctic). I did not install an OS yet, and when checking the temperature in the BIOS, CPU is at 69 to 73°c range (increases gradually by 0.5 every few sec). Motherborad temp at 27°, +1.5 from room temp. VR temp at 30°C. I have changed the thermal paste twice (arctic mx-4) Bois ver: 3.80 Any help/suggestion?

Nash Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 09 Feb 2022 Status: Offline Points: 65	Post Options Post Reply Quote Nash Report Post Thanks(0) Quote Reply Posted: 09 Feb 2022 at 10:25am
	I want to add: although BIOS reading of CPU temp is around 69-73°C, the heatsink of the air cooler feels normal not even warm or hot. Could this be a sensor problem?

Nash Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 09 Feb 2022 Status: Offline Points: 65	Post Options Post Reply Quote Nash Report Post Thanks(0) Quote Reply Posted: 09 Feb 2022 at 11:39am
	Update: I downloaded win 10, and checked the temp using three software: 1) HWMonitor: min 31°c max 43°C. 2) core temp: min 32°c max 43°c 3) NZXT CAM:29°c These readings seems reasonable, in contrary to the BIOS reading, which 69°c to 73°c range. Any help in fixing this issue? Which one should I trust?

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Online Points: 22748	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: 09 Feb 2022 at 8:13pm
	The BIOS reads the Tctl sensor (thermal control) temp which uses an offset to ensure rapid and reliable fan control. The offset for Threadripper is +27°C so your reported temp in BIOS is actually 44c which is perfectly normal for the load the UEFI puts on the system. Unlike the older BIOS system, the UEFI actually applies a fair amount of load to one of the cores which results in a load temp in BIOS rather than an idle one. I have to admit, it freaked me out a little when I built my TR system too. I thought I had forgotten to remove the plastic film from my waterblock In other words, everything is functioning correctly and your upper temp in OS of 43c is perfectly in line with the temp in the BIOS. Edited by Xaltar - 09 Feb 2022 at 8:14pm


Nash Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 09 Feb 2022 Status: Offline Points: 65	Post Options Post Reply Quote Nash Report Post Thanks(0) Quote Reply Posted: 10 Feb 2022 at 6:48am
	Thank you so much for the informative reply. It is realy very helpful.

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Online Points: 22748	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: 10 Feb 2022 at 8:13am
	Happy to help, enjoy your new system. Threadripper is a lot of fun