BSOD code 124 means insufficient vCore. Try playing with higher Load-line Calibration, preferably "Very High" which usually gives minimal vdroop during load.

Oops I always forgot that LLC for Haswell controls the vdroop of VCCIN but not vCore lol, although it does help sometimes in my OC.

No choice have to play with vCore. Looks like your chip needs more juices.

Have u try upping ur VCCIN? Put ur Vcore at 1.35v ceiling (1.44v is too high already), up ur VCCIN and enable LLC to highest setting VCCIN can try until 2V (default 1.8V, but will register as low as 1.65-1.7V if LLC is disable). How about uncore multi? Try x40 or below when ur OC reach 4.5Ghz and not stable.