Well, I installed WhoCrashed to have more information about what was wrong, and now in addition to the ntoskrnl.exe, there is intelppm.sys and win32kfull.sys
Crash dumps are enabled on your computer.
Crash dump directories:
C:\Windows
C:\Windows\Minidump
On Sat 13/2/2021 19:15:38 your computer crashed or a problem was reported
crash dump file: C:\Windows\Minidump\021321-6390-01.dmp
This was probably caused by the following module:
ntoskrnl.exe (nt+0x3F5A80)
Bugcheck code: 0x9C (0x80000001, 0xFFFF8D80CF8A7B10, 0x0, 0x0)
Error:
MACHINE_CHECK_EXCEPTION
file path: C:\Windows\system32\ntoskrnl.exe
product:
Microsoft® Windows® Operating System
company:
Microsoft Corporation
description: NT Kernel & System
Bug check description: This bug check indicates that a fatal machine check exception has occurred.
The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.
On Sat 13/2/2021 19:15:38 your computer crashed or a problem was reported
crash dump file: C:\Windows\MEMORY.DMP
This was probably caused by the following module:
win32kfull.sys (win32kfull+0xE403F)
Bugcheck code: 0x9C (0x80000001, 0xFFFF8D80CF8A7B10, 0x0, 0x0)
Error:
MACHINE_CHECK_EXCEPTION
file path: C:\Windows\system32\win32kfull.sys
product:
Microsoft® Windows® Operating System
company:
Microsoft Corporation
description: Full/Desktop Win32k Kernel Driver
Bug check description: This bug check indicates that a fatal machine check exception has occurred.
The crash took place in a Microsoft module. Your system configuration may be incorrect. Possibly this problem is caused by another driver on your system that cannot be identified at this time.
On Sat 13/2/2021 18:53:59 your computer crashed or a problem was reported
crash dump file: C:\Windows\Minidump\021321-6343-01.dmp
This was probably caused by the following module:
intelppm.sys (intelppm+0x138f)
Bugcheck code: 0x101 (0x20, 0x0, 0xFFFF8000EFD80180, 0x1)
Error:
CLOCK_WATCHDOG_TIMEOUT
file path: C:\Windows\system32\drivers\intelppm.sys
product:
Microsoft® Windows® Operating System
company:
Microsoft Corporation
description: Processor Device Driver
Bug check description: This indicates that an expected clock interrupt on a secondary processor, in a multi-processor system, was not received within the allocated interval. This can be caused by non-responding hardware or by a overheated CPU (thermal issue).
The crash took place in a Microsoft module. The description of the module may give a hint about a non responding device in the system.
On Sat 13/2/2021 18:38:21 your computer crashed or a problem was reported
crash dump file: C:\Windows\Minidump\021321-7828-01.dmp
This was probably caused by the following module:
ntoskrnl.exe (nt+0x3F5A80)
Bugcheck code: 0x9C (0x80000001, 0xFFFFB4008935BB10, 0x0, 0x0)
Error:
MACHINE_CHECK_EXCEPTION
file path: C:\Windows\system32\ntoskrnl.exe
product:
Microsoft® Windows® Operating System
company:
Microsoft Corporation
description: NT Kernel & System
Bug check description: This bug check indicates that a fatal machine check exception has occurred.
The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.
On Sat 13/2/2021 18:33:57 your computer crashed or a problem was reported
crash dump file: C:\Windows\Minidump\021321-6703-01.dmp
This was probably caused by the following module:
intelppm.sys (intelppm+0x138f)
Bugcheck code: 0x101 (0x20, 0x0, 0xFFFFB7816F980180, 0x1)
Error:
CLOCK_WATCHDOG_TIMEOUT
file path: C:\Windows\system32\drivers\intelppm.sys
product:
Microsoft® Windows® Operating System
company:
Microsoft Corporation
description: Processor Device Driver
Bug check description: This indicates that an expected clock interrupt on a secondary processor, in a multi-processor system, was not received within the allocated interval. This can be caused by non-responding hardware or by a overheated CPU (thermal issue).
The crash took place in a Microsoft module. The description of the module may give a hint about a non responding device in the system.
On Sat 13/2/2021 14:24:14 your computer crashed or a problem was reported
crash dump file: C:\Windows\Minidump\021321-9062-01.dmp
This was probably caused by the following module:
ntoskrnl.exe (nt+0x3F5A80)
Bugcheck code: 0x9C (0x80000001, 0xFFFFF80367298B10, 0x0, 0x0)
Error:
MACHINE_CHECK_EXCEPTION
file path: C:\Windows\system32\ntoskrnl.exe
product:
Microsoft® Windows® Operating System
company:
Microsoft Corporation
description: NT Kernel & System
Bug check description: This bug check indicates that a fatal machine check exception has occurred.
The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.
Maybe this helps to know what it is, although I still have in mind to buy another psu to try