High CPU Temperature in BIOS
Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=11608
Printed Date: 18 Oct 2024 at 8:31pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: High CPU Temperature in BIOS
Posted By: mETALFIRTINa
Subject: High CPU Temperature in BIOS
Date Posted: 05 Jun 2019 at 11:01am
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Hey guys, X399M Taichi CPU temperature is wrong in BIOS. It shows as 69 degrees, but in Windows10 only 34 degrees. Due to the wrong CPU temperature, the fans are always 100%. Please ASROCK fix this in next BIOS. |
Replies:
Posted By: ASRock_TSD
Date Posted: 05 Jun 2019 at 11:48am
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Dear mETALFIRTINa, Greetings, this is ASRock TSD. Referring your question about wrong temperature under BIOS, we have built a system to check it. However, both CPU temperature and the fan speed are running properly. It is normal that CPU temperature under BIOS show higher than temperature show under operating system. The reason is that there are no drivers under BIOS that will allocate the energy more efficiently. With drivers under Windows, CPU temperature will become lower. Thanks! All the best, ASRock TSD |
Posted By: paologab
Date Posted: 05 Jun 2019 at 4:46pm
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hi due to the reference of the OP to the fans I think that the problem is the well known one thet you can see in the forum first sticky thread. The bios exposes two temperatures one for the fans (tDie temperature plus an offset of +30°C for the TR) and one for everyone (tDie). The bios shows also the M/B temperature, that can also be set as reference for the fans. So in Windows may be you see only one of the latters (tDie or M/B) while the fans are set to monitor tDie that to fans is exposed with the offset of +30°C. To adjust them bahaviour use the Fan-tastic menu in bios to shape your fan curve and the sensor reference ------------- AMD Ryzen 7 2700X w/Wraith prism x470 Taichi bios 3.50 16gb HX432C16PB3K2/16 (hynix H5AN8G8NCJR-UHC) M.2 970 EVO, SATA SSD, 2 SATA HDD AMD Radeon RX 580 8G OC Linux Kernel 5.4 Manjaro Stable XFCE |
Posted By: daddyo
Date Posted: 31 Jul 2019 at 11:13pm
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I have a similar question. I recently updated my UEFI, and so fan settings were reset. I tried setting the CPU fan settings to custom, to lower speed when computer is idle. The CPU fan can be set to monitor "CPU", "M/B", or "TCTL". I initially set to CPU, and set my temperatures, and fan speeds. When I tested in windows, my fan speed would not go up, at all, when the CPU was under load and temperatures were rising. In order for it to work, I had to set the monitor to TCTL, and used temperatures with an offset of +27c. This seems to work, but now, because there is a hard limit of 100c in the temperature settings, the critical temp can only be 100 at the max, which, in TCTL mode, means a die temp of 73c. Does that mean my computer will shut down if my cpu reaches 73c? That could happen... How to I properly set the CPU fan??? |
Posted By: paologab
Date Posted: 01 Aug 2019 at 4:27pm
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hi while we wait for someone from ASRock, my two pence. You should say which m/b and bios you have. That said, actually any bios should have only CPU (the old tCtrl) and MB sensors shown, so I think you have an old bios. For the temperature cap, 100° and the offset is for the fans, for what I've understood, while the real cpu temperature limit is hardcoded in the cpu itself (for my ryzen should be 85°), so once there it starts throttling in order to reduce the load and keep the temperature there. This is the behaviour I observed. For istance, with heavy stress the temperature rockets to 80° (and so do the fans...) than gradually in few minutes reaches 85° and stays there forever (or until I kill the stressing processes). I never had a shut down due to the temperature level. Anyway you can test it yourself, simply burn an ISO (win PE or linux), boot it and stress the cpu (for linux I use stressng with matrix option), so even if you have a shutdown, you don't put at risk your working system and you can tweak more. ------------- AMD Ryzen 7 2700X w/Wraith prism x470 Taichi bios 3.50 16gb HX432C16PB3K2/16 (hynix H5AN8G8NCJR-UHC) M.2 970 EVO, SATA SSD, 2 SATA HDD AMD Radeon RX 580 8G OC Linux Kernel 5.4 Manjaro Stable XFCE |
Posted By: gizmic
Date Posted: 01 Aug 2019 at 5:32pm
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i believe the bios does put the cpu in stress and max voltage for it to POST ------------- 
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Posted By: daddyo
Date Posted: 01 Aug 2019 at 11:48pm
Thanks for responding. Sorry I didn't mention my m/B. It's the same as the OP on this thread, which is why I didn't mention it. Taichi x399, with UEFI 3.50; the latest. And there is a TCTRL temperature sensor option for the CPU fan control. It's the only one that controls the curve. I think the Threadripper has a higher temperature threshold than your CPU. But I may be wrong. Thanks for checking in. |
paologab wrote:Posted By: daddyo
Date Posted: 01 Aug 2019 at 11:51pm
OH and my CPU is a 1950x. 
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Posted By: paologab
Date Posted: 02 Aug 2019 at 8:19pm
no you're right, normal ryzen +10°C while TR +30°C offset ------------- AMD Ryzen 7 2700X w/Wraith prism x470 Taichi bios 3.50 16gb HX432C16PB3K2/16 (hynix H5AN8G8NCJR-UHC) M.2 970 EVO, SATA SSD, 2 SATA HDD AMD Radeon RX 580 8G OC Linux Kernel 5.4 Manjaro Stable XFCE |
Posted By: rewtdawg
Date Posted: 30 Nov 2019 at 12:32am
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This still affects the x399 and threadripper 2. This exact same issue happens on my phantom gaming 6 with the latest 1.30 BIOS Just bought my MB yesterday and was freaking out that I had done something wrong and was cooking my threadripper.. This same issue also reports the incorrect CPU temp to EVGA cooling software as well. Ryzen Master reports the correct CPU temp. |
Posted By: Tsuprano2019
Date Posted: 03 Dec 2019 at 12:33pm
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I just got done putting together an X399 phantom Gaming 6 rig with a 1920X and my initial temps in the BIOS are showing 71.5 C under the hardware monitor tab. It seems really high but the system is responsive and seems to run fine. I am not sure what BIOS temps should look like but this does seem excessive. M/B temp is 29 C V Core temps are between 26 and 28 C Can someone else check their temps and let me know if I am crazy high. Rig fired right up and seems fine but I don't want to burn my first Threadripper. |
Posted By: gizmic
Date Posted: 03 Dec 2019 at 12:52pm
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as stated before this is perfectly normal it doesn't have windows to tell it to calm down all is part of the POST process without this feature you guys will be booting into windows and crashing assuming the cpu isn't stable -------------
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