Your problem is that you overclocked without messing with any other settings. I mean you had your CPU at 2.6ghz on 1.3 VCORE? Of course it's crashing.
Is your HTT still at 5x? How about your RAM, are you running a divider?
I recommend putting everything at stock speeds...and overclocking the right way: gradually, with testing, and by lowering your HTT multiplier, increasing voltages, running a memory divider, playing with RAM timings.