Issues with MAG X870 Tomahawk

reaktiiv15be02f1

New member
Joined
Feb 6, 2026
Messages
12
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.
 
You can try and pry a tiny flathead screwdriver in, bending them back gently, I did this when I squeezed 2 pins to the bottom of the connector. Those usb3 connectors are a pain to install. I bought a usb 3 extender connector in the right angle and even that one was a very tight fit. the usb 3 cable from my case fitted perfectly in that connector without a hassle.
And yes, I've read several posts from people that exchanged their board and got a new one without this problem. Working fine from the start.
 
Thanks to everyone for sharing their experiences.

My problem is rather consistent as in 90 % of times, it takes 10-20 minutes of gaming for the temperature freeze to happen.

I have now filed an RMA as well, we will see how it goes.
 
Thanks to everyone for sharing their experiences.

My problem is rather consistent as in 90 % of times, it takes 10-20 minutes of gaming for the temperature freeze to happen.

I have now filed an RMA as well, we will see how it goes.
After I removed the motherboard, on the other 19/20 pin usb front header port when I was inspecting it I noticed all the pin were bent inside so I think Argos gave me a used motherboard even though they say they get their stock new from the factory.
 
Thanks to everyone for sharing their experiences.

My problem is rather consistent as in 90 % of times, it takes 10-20 minutes of gaming for the temperature freeze to happen.

I have now filed an RMA as well, we will see how it goes.
After I removed the motherboard, on the other 19/20 pin usb front header port when I was inspecting it I noticed all the pin were bent inside (I didn't use this port) so I think Argos gave me a used motherboard even though they say they get their stock new from the factory.
 
Last edited:
The pins are from a very soft material alright. I was lucky I could bend them back, had to remove the motherboard from the case to align the connector and force them straight again plugging it in. My PC case isn't suited for these side connectors, and the previous board had them next to the normal USB connectors, so that never gave a problem. The 2 cpu power connectors were also a tight fit, at first the system didn't get enough power to start and needed a reseat of all connectors.
Funny detail, if I couldn't get those pins straight I would have rma'ed it, especially after the initial problems of a 15 minute memory training and no signal to my monitor during that process, which I only realised after all was working.
 

Attachments

  • Screenshot_20260209_074518_Reddit.jpg
    Screenshot_20260209_074518_Reddit.jpg
    799 KB · Views: 50
For the record, the retailer handling the RMA requested me to try if the problem would occur using default BIOS settings. Doing as asked, I reset the settings to default, which all in all made the following changes:
  • EXPO: Profile 1 --> Disabled.
  • Memory Context Restore: Enabled --> Auto.
  • Power Down Enable: Enabled --> Auto.
After this, I tried to get the temperature freeze to occur again. At five consecutive attempts (booted the PC in between), the problem occurred each time after 5-15 minutes of gaming.

Long story short, changing the BIOS settings to default had no impact on the issue.
 
It's a bios issue. He uses a different motherboard with a different bios

If this was a bios issue the problem could be fixed trying out any bios

If this was a bios issue we would see thousands of reports about this, but there is not even a hundred

I tried them all ( as many did here ) and the issue still there, so yeah, its not a bios issue, its a hardware one

Btw I even tried on ANOTHER 870 tomahawk that doesn't has any issue, so yeah, not bios


Specially since this is being reported for more than a year already and msi doesnt know what is going on ( according to them )
 
Last edited:
If this was a bios issue the problem could be fixed trying out any bios

If this was a bios issue we would see thousands of reports about this, but there is not even a hundred

I tried them all ( as many did here ) and the issue still there, so yeah, its not a bios issue, its a hardware one

Btw I even tried on ANOTHER 870 tomahawk that doesn't has any issue, so yeah, not bios


Specially since this is being reported for more than a year already and msi doesnt know what is going on ( according to them )
If the bug has never been taken into consideration, there can’t be a fix in any BIOS version. The hope is with the new AGESA 1.3 version, which is much more stable and more advanced than the previous ones. I’m sure that if you run the tests properly on the other 870 as well, the bug will occur. We’ve discovered that it doesn’t happen on every boot, if you’re on a ‘good’ one, it won’t occur even after hours of stress testing.
 
If the bug has never been taken into consideration, there can’t be a fix in any BIOS version. The hope is with the new AGESA 1.3 version, which is much more stable and more advanced than the previous ones. I’m sure that if you run the tests properly on the other 870 as well, the bug will occur. We’ve discovered that it doesn’t happen on every boot, if you’re on a ‘good’ one, it won’t occur even after hours of stress testing.
This has been reported for more than a year already, literally, people linked a thread with like another 6 external links reporting the same issue, some people open tickets and this never got fixed, if this was a bios issue, EVERY x870 tomahawk would have an issue, and that is not the case, i tested it for more than 2 days, and you can see MULTIPLE people that changed the board for the same one, and the issue got fixed, its just a bad batch prob
 
This has been reported for more than a year already, literally, people linked a thread with like another 6 external links reporting the same issue, some people open tickets and this never got fixed, if this was a bios issue, EVERY x870 tomahawk would have an issue, and that is not the case, i tested it for more than 2 days, and you can see MULTIPLE people that changed the board for the same one, and the issue got fixed, its just a bad batch prob
The BIOS is not written entirely by MSI, so they cannot fix it if the issue comes, for example, from the AMD AGESA part, and this bug concerns AMD CPUs. That’s why version 1.3 is a concrete hope. We should also remember that MSI is still on 1.2.0, while ASUS is using 1.2.7.
 
The BIOS is not written entirely by MSI, so they cannot fix it if the issue comes, for example, from the AMD AGESA part, and this bug concerns AMD CPUs. That’s why version 1.3 is a concrete hope. We should also remember that MSI is still on 1.2.0, while ASUS is using 1.2.7.
And that is irrelevant because is not a bios issue when we have multiple x870 tomahawk with 0 problems :-)
 
And that is irrelevant because is not a bios issue when we have multiple x870 tomahawk with 0 problems :-)
The bug only happens when the CPU is at 100% for a prolonged period. In normal usage it almost never occurs. I personally don’t experience the issue for weeks unless I put the PC under heavy stress with intensive processing (I’m a developer). If you don’t run the stress test properly and across multiple reboots, you might never encounter it.
 
Back
Top