Here are the essence of your 2 faults in 3 lines each:
SYSTEM_THREAD_EXCEPTION_NOT_HANDLED (7e)
DEFAULT_BUCKET_ID: NULL_CLASS_PTR_DEREFERENCE
SYMBOL_NAME: igdkmd64+1a361a
PAGE_FAULT_IN_NONPAGED_AREA (50)
DEFAULT_BUCKET_ID: WIN8_DRIVER_FAULT
SYMBOL_NAME: igdkmd64+1d887d
It is clearly a an Intel driver fault, but root cause may very well be HW.
Try the following in this order and see if the problem repros:
a) uninstall and remove the Intel driver, and wait 2 - 3 weeks or 2 - 3 crashes, whichever happens first
b) re-install the latest intel driver, and wait 2 - 3 weeks or 2 - 3 crashes, whichever happen first
If it crashes in both cases, chances are good that you have some kind of HW error, and you should try to get an exchange