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CPU running at 0,40GHz after upgrading motherboard
The CPU only gets 0.74V and the internal GPU isn‘t recognized either. Try to flash the UEFI with the latest version and load default settings after reboot. Then check the settings for CPU in the UEFI.
Looking at the cut-pictures you posted, on the far-right side, in the BIOS the frequency, ratio etc. should be ok? There should be frequency 3600, Ratio x36...
After trying everything else (like re-flashing, loading default settings...), try some usb boot stick with Linux and check if it runs there like it should or also with slow speed. Maybe the energy settings in Windows (and Windows installer) are fubar.
Did you try some memory test like memtest from USB stick? There you should also see if the CPU runs like it should or if the cpu is slow as hell.
edit: Maybe the mainboard is defect? Also possible.