INTERNAL_POWER_ERROR error can be caused by faulty power supply, loose cables, APM drivers. Disable all the power management, from BIOS and from Windows. When the system boots up, check in the device manager if the APM device (in Device Manager >> System Devices) is fine, check if it has a yellow blob beside it.
It might be helpful looking at:
1) Crash dumps located at C:\Windows\Minidump.
2) CPU-Z screenshots of MEMORY and CPU tabs.
3) Passmark Rammon HtML.zip