sebastien.pellizzar156b02de
New member
- Joined
- May 14, 2025
- Messages
- 3
Hello,
The issue:
My computer can only POST right after performing a CMOS Clear. After it manages to POST, if I:
- enter BIOS and exit, or
- boot Windows and shutdown, or
- boot Windows and restart,
then it can never POST again until I perform a CMOS Clear again.
The build:
Motherboard: MSI MAG MORTAR B850M WIFI
Current BIOS version: E7E61AMSI.1A30 (April 18, 2025)
CPU: 9950x
RAM: CMK96GX5M2B6400C32 ver5.53.13 (It's a 2x48GB kit with SPD 4800MHz/1.1V and it's on the MB's QVL)
PSU: Corsair SF1000
SSD: Crucial T700 Pro
What happens after a CMOS Clear:
I perform the CMOS Clear by pressing the corresponding button at the rear of the motherboard.
When I start after a CMOS Clear, the CPU (red) and DRAM (yellow) leds stay on for ~50 seconds, then they go off for a few seconds, then the DRAM (yellow) led stays on for a bit less than 2 minutes. After that, I see a screen telling me hardware changes were detected, and asking me whether I want to enter BIOS or continue with default settings.
If I choose to continue with default settings, I'm able to boot into Windows correctly.
If I restart the PC from Windows, or I choose to enter BIOS and exit it (with or without any change), then the DRAM (yellow) led stays on indefinitely (I tried letting it for up to 2 hours).
From there I can shutdown the PC by holding the power button for 5 seconds, but when I start it again, the CPU and DRAM leds stay on indefinitely. Same thing if I shutdown the PC from Windows after I manage to boot, and start the PC again.
What I tried so far:
- using the two sticks in A2 and B2, or a single stick in A2 changes nothing.
- entering the BIOS and tried changing the following settings (only one change per attempt) changes nothing: changed Memory Context Restore from Auto (default) to Disabled, changed PBO from Auto (default) to disabled.
Other information:
- the CPU, RAM, PSU and SSD worked fine on an ASRock B850M Pro RS. I wanted to try the MSI MAG MORTAR B850M because I had stability issues with my RAM kit with anything above 4800Mt/s, and hoped to get better results on the MSI one as this kit is on its QVL.
- in the MSI BIOS (with default settings), it says the Core Voltage is 1.354V. I find it strange, I was under the impression that it was a rather high value for Ryzen 9000.
My options are:
- try another RAM kit on the QVL,
- try another PSU, as I saw in this thread that another person seemed to have similar issues with a Corsair PSU,
- send back the MSI motherboard, keep the ASRock one, and try another RAM kit on it.
What are your thoughts?
Thanks for your help
The issue:
My computer can only POST right after performing a CMOS Clear. After it manages to POST, if I:
- enter BIOS and exit, or
- boot Windows and shutdown, or
- boot Windows and restart,
then it can never POST again until I perform a CMOS Clear again.
The build:
Motherboard: MSI MAG MORTAR B850M WIFI
Current BIOS version: E7E61AMSI.1A30 (April 18, 2025)
CPU: 9950x
RAM: CMK96GX5M2B6400C32 ver5.53.13 (It's a 2x48GB kit with SPD 4800MHz/1.1V and it's on the MB's QVL)
PSU: Corsair SF1000
SSD: Crucial T700 Pro
What happens after a CMOS Clear:
I perform the CMOS Clear by pressing the corresponding button at the rear of the motherboard.
When I start after a CMOS Clear, the CPU (red) and DRAM (yellow) leds stay on for ~50 seconds, then they go off for a few seconds, then the DRAM (yellow) led stays on for a bit less than 2 minutes. After that, I see a screen telling me hardware changes were detected, and asking me whether I want to enter BIOS or continue with default settings.
If I choose to continue with default settings, I'm able to boot into Windows correctly.
If I restart the PC from Windows, or I choose to enter BIOS and exit it (with or without any change), then the DRAM (yellow) led stays on indefinitely (I tried letting it for up to 2 hours).
From there I can shutdown the PC by holding the power button for 5 seconds, but when I start it again, the CPU and DRAM leds stay on indefinitely. Same thing if I shutdown the PC from Windows after I manage to boot, and start the PC again.
What I tried so far:
- using the two sticks in A2 and B2, or a single stick in A2 changes nothing.
- entering the BIOS and tried changing the following settings (only one change per attempt) changes nothing: changed Memory Context Restore from Auto (default) to Disabled, changed PBO from Auto (default) to disabled.
Other information:
- the CPU, RAM, PSU and SSD worked fine on an ASRock B850M Pro RS. I wanted to try the MSI MAG MORTAR B850M because I had stability issues with my RAM kit with anything above 4800Mt/s, and hoped to get better results on the MSI one as this kit is on its QVL.
- in the MSI BIOS (with default settings), it says the Core Voltage is 1.354V. I find it strange, I was under the impression that it was a rather high value for Ryzen 9000.
My options are:
- try another RAM kit on the QVL,
- try another PSU, as I saw in this thread that another person seemed to have similar issues with a Corsair PSU,
- send back the MSI motherboard, keep the ASRock one, and try another RAM kit on it.
What are your thoughts?
Thanks for your help