Issues with MAG X870 Tomahawk

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reaktiiv15be02f1

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Cheers,

  • I just recently upgraded my rig with Tomahawk, 9850X3D and Kingston DDR5. After clean installation of the operating system and starting to use the new hardware, I have faced some issues that I never had before. The issues are:

1) The PC won't completely turn off when I shut it down. The monitors go black but lights stay on on the GPU and case fans.

2) During desktop use, my CPU temps are around 45 C which is ok. When gaming, the temps have been on average around 65 C, which is also ok. However, after I stop gaming and return to desktop, the gaming temps remain for as long as I shut down the PC. For example, if I quit the game to desktop and leave the pc on idle, the temperature won't drop but is still around 65 degrees, no matter how long I give the PC time to "cool down".

3) On couple of occasions, the CPU temps have remained at solid 45 C no matter what I have done - desktop or intensive gaming. I have checked the temperature on the onboard LCD display and using HWMonitor, and it is probably correct as on these occasions the fans have not increased their RPM like they usually do under load.

So far what I have tried to do is:
1. Disable fast startup in Windows - no effect.
2. Enable and disable ErP ready mode - no effect.
3. Updated BIOS and chipset drivers to latest - effortless installation but no effect on the problems.

What should I do? Is this just a driver/software related problem, or is there a chance the hardware is faulty?

Thanks.
 
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sojer2005 said:
Asrock has released BIOSes with AGESA 1.3.0.0a. This is probably a newer version than pre 1.3.0.0 (currently used by MSI). A new version will probably be released by MSI soon.
Click to expand...
xeizoo said:
I'm running 1.3.0.0a Beta-bios on my ASUS board, so yes it is out, Gigabyte is still on 1.2.8.0 but they seem to regularly drag behind.
Click to expand...
Asrock and Asus released beta BIOS updates with AGESA 1.3.0.0a for those interested. I hope and assume MSI will follow suit. MSI typically releases beta BIOSes on Fridays.
 
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ericj159802e9 said:
AGESA pre-1.3.0.0 is not the same as AGESA 1.3.0.0a as a quick look at AM5 AGESA/UEFI/BIOS List | SMU AM5/AM4 Table is showing.
Click to expand...

You’re right, “AGESA PI pre-1.3.0.0” is not the same as AGESA 1.3.0.0a.

What MSI released appears to be an internal/preliminary branch based on 1.3, but not the finalized 1.3.0.0a code that some other vendors have referenced. That said, I tested it under the exact same conditions (stock settings, no EXPO, OCCT AVX512), and the behavior is identical: sensors freeze, CPU Package power drops to 0 W, and monitoring tools stop responding.

So regardless of the naming difference, the issue is still fully reproducible on this build.

At this point it doesn’t look like this particular update changes anything related to the sensor freeze problem. I’ll wait to see if a proper 1.3.0.0a (or final 1.3 branch) BIOS is released, but so far there’s no improvement.
 
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Personal update: RMA of the Tomahawk completed. This time I decided to try my luck with X870E Aorus Elite, which is currently selling for cheaper at the retailer than the board I returned. Wish me luck.

By the way, the vendor told me he considered my RMA case rather interesting and had never before faced any similar faults with mobos 😅
 
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reaktiiv15be02f1 said:
Personal update: RMA of the Tomahawk completed. This time I decided to try my luck with X870E Aorus Elite, which is currently selling for cheaper at the retailer than the board I returned. Wish me luck.

By the way, the vendor told me he considered my RMA case rather interesting and had never before faced any similar faults with mobos 😅
Click to expand...
nice choice, this will be the mobo i will be getting too in some weeks, cant wait to get rid of this.
 
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Today reply

Content:
Sorry for the late reply, we are still checking if the issue can be fixed by software, kindly please wait for us. Thank you and sorry for the inconvenience caused you!

We are cooked
 
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rafaelg.mott159402e2 said:
Today reply

Content:
Sorry for the late reply, we are still checking if the issue can be fixed by software, kindly please wait for us. Thank you and sorry for the inconvenience caused you!

We are cooked
Click to expand...
Reply from the vendor? Oh geez...

Btw, I can really recommend the X870E Aorus Elite. No problems with installation, and it has been working flawlessly ever since. Even CPU temps remain lower with equal performance.
 
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OK so here is what I've recently found to be the most stable, with the least amount of tweaking, offering almost negligible performance trade-off, currently 40+ hours without a restart, gaming and other misc testing in the mix, and anything that I can try that typically trips the issue.

- Latest BIOS installed (AGESA pre-1.3.0.0 - in my case 7E59v2AA0), of course -

I have the following:
- EXPO Enabled (6000MT/s, 36-36-36-36-96-146-884-1T) with High Efficiency set to Enabled, Balanced for sub-timing tightening
- Almost all power settings currently Auto (CPU Misc default to 1.1, SOC default to 1.2)
- Curve optimizer disabled -- Enabled works fine for me as well, I just wanted to see if higher core voltage increased likelihood of occurrences
- Config TDP set to 105w, down from the default 120w for my CPU

I'm leaning towards an issue with power delivery with more demanding chips that can manage 120w TDP and greater, specifically with a sustained load that can heat soak and slow down MOS really good... whether this is actually occurring in the software (BIOS) is yet to be seen.
 
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ben159d02de said:
OK so here is what I've recently found to be the most stable, with the least amount of tweaking, offering almost negligible performance trade-off, currently 40+ hours without a restart, gaming and other misc testing in the mix, and anything that I can try that typically trips the issue.

- Latest BIOS installed (AGESA pre-1.3.0.0 - in my case 7E59v2AA0), of course -

I have the following:
- EXPO Enabled (6000MT/s, 36-36-36-36-96-146-884-1T) with High Efficiency set to Enabled, Balanced for sub-timing tightening
- Almost all power settings currently Auto (CPU Misc default to 1.1, SOC default to 1.2)
- Curve optimizer disabled -- Enabled works fine for me as well, I just wanted to see if higher core voltage increased likelihood of occurrences
- Config TDP set to 105w, down from the default 120w for my CPU

I'm leaning towards an issue with power delivery with more demanding chips that can manage 120w TDP and greater, specifically with a sustained load that can heat soak and slow down MOS really good... whether this is actually occurring in the software (BIOS) is yet to be seen.
Click to expand...
Run it on occt avx512 extreme. Is the fastest way to reproduce those sensor issues

Plus it can happen regardless if you stress your cpu or not, so its not a matter of tdp, stressing it just make it appear quickly
 
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rafaelg.mott159402e2 said:
Run it on occt avx512 extreme. Is the fastest way to reproduce those sensor issues

Plus it can happen regardless if you stress your cpu or not, so its not a matter of tdp, stressing it just make it appear quickly
Click to expand...
I can vouch for this answer, the issue occurred even under very light load (desktop/surfing), just not as often as when gaming.
 
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hey guys, same issue here.
It can happen that my CPU temperature and the associated CPU fan speed can get stuck under load.
The problem occurs rarely and is difficult to reproduce.
I noticed it recently when I was playing Borderland 4 for a longer period of time and after quitting I noticed that the
value for the CPU temperature was stuck at 75° and also the CPU fan speed. Likewise, the consumption (watts) remains at 0%.
I read the values with "Libre Hardware Monitor".
The problem can only be resolved by rebooting.
I have to mention that a shutdown is not properly possible if this situation happens. <fans are spinning forever.

I bought the board on 04.Aug.2025.

I opened a ticket and support wrote the following in response (26.12.2025):
Thanks for contacting MSI technical support.
Regarding your concern, we are collecting motherboards that can be replicated to analyze this issue. Please wait for us and we will reply you when we get any message about it. Thank you !
Thanks for your cooperation in advance!

Response (18.02.2026): Sorry to say that we are still checking this issue. Due to the current Chinese Spring Festival holiday, there may be delays. Sorry for it !

Best Regards,
Markus
 
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I just started playing around with Curve Optimizer yesterday with a 9800x3d, and was only able to pass an hour of occt at all offset -21. So this morning I decided to try the oc portion and add +200 to the clock. While running cinebench I had the sensors freeze on me. Rebooted, ran cinebench, they froze again. Sadly also somehow me saving my excel file with screenshots of results was also corrupt and somehow lost all the pictures. So definitely something is going on once I add more to the cpu clock. Also I disabled the integrated gpu at the same time, but I doubt thats a factor. But who knows. Im on A70 as I use a pcie/hba sas card, and the latest pre 1.3.0.0 would cause a 2minute delay on post due to my sas card. Unplug it, instant boots. On A70 the debug code sits at A0 for only 10 seconds vs 2 minutes. So Ill need to wait until another bios revision to retest.
 
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TheGlow said:
Sadly also somehow me saving my excel file with screenshots of results was also corrupt and somehow lost all the pictures.
Click to expand...
Try running checkdisk to see if that is able to fix possible damages to the file system. How to run checkdisk? Open the command prompt as administrator and execute the following:
Code: 
chkdsk /f
 
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New response from support team (08.Mar.2026):
Please download and update the BIOS in the link below to check if it helps. Thank you !

I still need to clarify a few things, for example which motherboard the BIOS is actually for, for the non-E or E version, before I can post further information.

Best Regards,
Markus
 
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