z890 carbon settings dont save properly, bios issue

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bandit862134302c4

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Jun 2, 2025
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Hello,
i have a solid overclock that is stable (very stress test you can think of and gaming). i can cold boot and reboot fine over and over.
This issue is when any change i make to bios and when i save the next boot the oc is unstable no matter what. i have my oc profile saved to replicate.

for example if i go in and turn secure boot off and save and boot again the pc is no longer stable. to fix i have to clear cmos. then load the same profile and save then its stable again. if i go in and change a setting same thing happens.
i have also made a 2nd profile that is identical to the other profile. the only diff is secure boot off vs on. If i load that profile and save and reboot the system is unstable again. reset cmos and load the profile with secure boot off then system stable again until i make any change in bios and save.

seems something is not saving properly

i have tested thios using the current windows insider build along with stable windows builds, and i have used a few linux distros as well with same effect. unstable and crashing. ubuntu, opensuse, parted magic. same results

this has been going on since i got the board 4-5 bios revisions ago.
265k
z890 carbon
48gb v-color 8000 cudimm ram

fyi i tried to make a ticket with msi, but when i click the submit button nothing seems to happen. so i either sent them the same issue 10 times or they didnt receive LOL
 
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Pangolin said:
Update:
Turn out MSI tested the BIOS but they couldn't spot error.

Z890 Carbon_8400.MOV

drive.google.com drive.google.com
But again, if you overclock system over the advertised speed, it would be all at your discretion.
Click to expand...
Thanks for the update. I'm glad they at least tried. I can confirm I no longer have the weird save bug if I don't change the CPU voltage setting
Left CPU at Auto for everything all works. So seems the same voltage issue the tomahawk has.

This is with the mem @8400.
 
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bandit862134302c4 said:
System only becomes unstable when any setting is changed...and saved.. and the setting could have no change to the overclock. Example just changing secure boot on to off back to on again.
Click to expand...
Do you save via F10, as most other save methods can be a bit flakey
 
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Alan J T said:
Do you save via F10, as most other save methods can be a bit flakey
Click to expand...
i always have scrolled to the save and exit. and hit enter.
same way im saving now with cpu oc @ auto. (no cpu oc.) ram still @ 8400MT ( no issues after save)

so ive concluded its not a ram issue. its a cpu setting somewhere thats not saving right. in all the madness i lost my settings for my original cpu oc. i still have my old profile but cant load that on new bios.
anyway its just weird that the system will boot over and over everyday (on the 5.5ghz oc) and once i would go in and save over or make a change it would get finnicky.
 
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The problem you're describing, Bandit, sounds a lot to me like an unstable frequency/timing setting for the ram. When you set a value that your Integrated Memory Controller (IMC, it's in the CPU) cant support then the system will fail to boot, and revert to previous settings so it can boot, or often you will have to clear the CMOS. 8400 is a very difficult speed for these Ultra 200 series CPUs to run.
I have an 8400Mhz rated kit, Z890 MPG CARBON WIFI, 285K and it will not run 200S stable without having to check the drive for errors every week due the NGU/D2D stability (VCC SA voltage, and VNNAON). I settled on 7200 because although I got it running stable at 8000 without 200s, I did not like the voltages I had to set to do that.

These 200 series chips have 2 IMC's on each chip (one for A channel and one for B channel) and the stock frequency for the IMC is 6400MHZ, which translates to 6400MHZ ram anything beyond that frequency is not garunteed because it's not the processors advertised speed. IT HAS NOTHING, and I mean NOTHING to do with the motherboard capabilities. It has to do with that "Silicon lotto" you always hear about. It's 100% your CPU and you will soon burn it out. These chips don't like to be push like that with ignorance, it makes them mad.

Also -It's very important you update the firmware on your board so that the processor becomes more stable at those frequencies... Bios as well (they are 2 different things), all should be the very latest if you're chasing speed like that.

- been building gaming rigs for 30 years since I was 11 years old.
 
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brijosho155502dd said:
The problem you're describing, Bandit, sounds a lot to me like an unstable frequency/timing setting for the ram. When you set a value that your Integrated Memory Controller (IMC, it's in the CPU) cant support then the system will fail to boot, and revert to previous settings so it can boot, or often you will have to clear the CMOS. 8400 is a very difficult speed for these Ultra 200 series CPUs to run.
I have an 8400Mhz rated kit, Z890 MPG CARBON WIFI, 285K and it will not run 200S stable without having to check the drive for errors every week due the NGU/D2D stability (VCC SA voltage, and VNNAON). I settled on 7200 because although I got it running stable at 8000 without 200s, I did not like the voltages I had to set to do that.

These 200 series chips have 2 IMC's on each chip (one for A channel and one for B channel) and the stock frequency for the IMC is 6400MHZ, which translates to 6400MHZ ram anything beyond that frequency is not garunteed because it's not the processors advertised speed. IT HAS NOTHING, and I mean NOTHING to do with the motherboard capabilities. It has to do with that "Silicon lotto" you always hear about. It's 100% your CPU and you will soon burn it out. These chips don't like to be push like that with ignorance, it makes them mad.

Also -It's very important you update the firmware on your board so that the processor becomes more stable at those frequencies... Bios as well (they are 2 different things), all should be the very latest if you're chasing speed like that.

- been building gaming rigs for 30 years since I was 11 years old.
Click to expand...
how does it boot fine for 3 months straight (cold or warm)? (also every stress test passed and gaming).if i dont go into bios and just change a random setting (like just enabling or disabling hd audio for example)? i also have 90% of the timings manually set.
hasnt happened with cpu voltage left on auto. im pretty confident its related to the cpu voltages not saving properly. like the tomahawk thread. all these z890- bios's are built about the same.

also when it fails after saving it does boot. it just crashes windoes 10 seconds in to load screen. so when i say it doesnt boot it doesnt fully boot into windows. clear cmos and bam all fixed with same profile.

ive never had it not post.. booting and posting are 2 different things

- looks like we are about the same age.
 
Last edited:
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Hello Anyone solving this issue.
Whenever i am enabling secure boot on and off and when cold boot happens next time (after few hours) it resets the whole settings and whole profile. It is not getting saved. I am not even overclocking anything or such. Just simple secure booth is doing this. All others are default settings of BIOS. I have basically dual booted windoes and ubuntu and need to turn it off.

i have:
BaseBoard Product MPG Z890 CARBON WIFI (MS-7E17)
BIOS Version/Date American Megatrends International, LLC. 1.AA0, 11-03-2026
Processor Intel(R) Core(TM) Ultra 9 285K, 3700 Mhz, 24 Core(s), 24 Logical Processor(s)
SMBIOS Version 3.8
 
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abhituls5158902dc said:
Hello Anyone solving this issue.
Whenever i am enabling secure boot on and off and when cold boot happens next time (after few hours) it resets the whole settings and whole profile. It is not getting saved. I am not even overclocking anything or such. Just simple secure booth is doing this. All others are default settings of BIOS. I have basically dual booted windoes and ubuntu and need to turn it off.

i have:
BaseBoard Product MPG Z890 CARBON WIFI (MS-7E17)
BIOS Version/Date American Megatrends International, LLC. 1.AA0, 11-03-2026
Processor Intel(R) Core(TM) Ultra 9 285K, 3700 Mhz, 24 Core(s), 24 Logical Processor(s)
SMBIOS Version 3.8
Click to expand...

Best open new own topic to troubleshoot this.
But see >>Posting Guide<< 1st
 
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I can confirm this issue on z890 Edge TI WiFi too. The saved voltages are not used consistently.
BIOS 7E19v2AA0
In my case it affects the E-cores.
I tried to report this through MSI support without any luck. They just don't understand what I mean.
I am posting here so perhaps it could save someone hours of trouble shooting.
In this state I would recommend getting a board from another vendor. It seems MSI is not interested in fixing this issue.

MSI-screenshot.jpg
 
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