Hi,
your dump is bugcheck 124 or a machine check exception.
Code:
FAILURE_BUCKET_ID: 0x124_GenuineIntel_PROCESSOR_CACHE
I know you ran the Intel diagnostic but try stress testing and see if the cpu holds up.
Watch the temps too.
I also notice your running Bitdefender. Sometimes third party AV suites can cause issues such as this, try removing as a test.
May I ask why you didn't use the warranty re the system?