Bug Check 0x124: WHEA_UNCORRECTABLE_ERROR
This bug check indicates that a fatal hardware error has occurred. This bug check uses the error data that is provided by the Windows Hardware Error Architecture (WHEA).
This error most commonly shows up due to an unstable OC.
Most other hardware failures would throw some other BSOD message, so this error generally points at the CPU or motherboard.
To clarify, you get no other BSOD messages?