I7 2600k Overclocking help?

[circumventor]

My System:
ASUS P8z68-V LX
i7 2600k
4GB DDR3 1333
Noctua NH-D14

My CPU is currently running at 4532.84MHz and getting 30c Idle and 50c under load. I would really like to push onto 5GHz but every time I go above 4.7 it crashes. I have tried moving the voltages up one notch at a time but I quit around 1.37v.

Can someone help me get to 5GHz or is 4.7 probably the max?

 

[WR2]

Hello Circumventor;

Did you find your way over into the Overclocking section of the forums?