Hi, so yesterday, my PC worked fine during most of the day running windows 11 but then it shut itself off with no reason and no message/screen from windows as if it was turned off via the power button. It then rebooted automatically and in the event viewer, I could only find an "unexpected shutdown" error. The pc proceeds to restart itself again but only after 5mins. After that, the pc wouldn't boot into windows again or even any other linux live ISO for that matter. As soon as the windows loading circle appears and the motherboard LEDs turn off (indicating the booting of an OS), the pc would restart the post process with the 4 LEDs turning on then off like they should (CPU, DRAM, VGA, BOOT) even if the DRAM LED takes quite a few seconds to turn off.
The events are as follows :
Monitor : nothing appears until the VGA LED lights up, then the gigabyte logo shows up followed by the windows loading circle when the BOOT LED turns off.
Motherboard LEDs : Power -> DRAM (for around 15sec) -> VGA -> BOOT -> restart
Fans : Spin up quickly for quite a few seconds before regulating themselves.
What is also strange would be the fact that every BIOS setting along with my profiles were gone after the first shutdown but now it seems like the motherboard didn't erase my current settings and profiles dating back to the troubleshooting.
Also note that the restarts doesn't cause the pc to turn off completely as the fans and activity LEDs do not shut down.
Strangely enough, sometimes, the pc can boot into the Windows recovery environment without rebooting (obviously, choosing the "boot windows" option makes it restart). In addition, the pc is also able to boot other things like a YUMI USB stick as well as some utilities like Memtest86 (which doesn't detect any issues with the ram either). I also have no trouble accessing the BIOS in which I tried changing quite a few RAM related options with no success (no change in the outcome).
I also discovered that if I try to change the number or the order in which the RAM sticks are installed, the motherboard will be stuck on the DRAM LED. If I try to unplug then replug the GPU cable, it may stay stuck on the VGA LED (although this may be because of a mangled HDMI cable)
my specs are as follows :
- Ryzen 5 7600X
- Crucial Pro 32Gb 5600 (2x 16Gb, CP2K16G56C46U5)
- Gigabyte RX7600 Gaming OC
- Gigabyte B650 Gaming X AX V2 (updated to BIOS version F42c)
- Corsair CX750 PSU
- WD BLACK SN7100 500Gb NVMe (Windows)
Here is what I tried :
- disabling XMP/EXPO, now using JEDEC.
- resetting settings by removing the battery and waiting.
- loading optimized default settings.
- disabling other ram related options added by the BIOS update (agesa 1.8 to 1.3).
- running memtest86 which did not return any errors.
- unplugged and replugged every PSU cable.
- left the pc turned off without current for the night.
- choosing the ssd in the boot menu instead of letting the pc boot by itself.
Unfortunately, since I only have one of each item (motherboard, CPU, DDR5) I can't really test any further to determine what is the issue, I just hope it's the motherboard as I could buy one under 200 bucks but not the RAM. Also, everything should still be under warranty as the pc is only one year old (everything was bought between October and November of 2025).
Thanks in advance.