New 4670k problems.

[m2rt]

Hello.

Just built my haswell setup using Asus z87-A board. So i tryed overclocking it to see what kind of results il get. I have good cooling BeQuiet Dark ROck PRO 2. I did the standard test pumped up
vcore to 1.25v and tryed different multipliers. To my suprise anything over 38 it wont even boot to windows. And even at stock speeds i get blue screen when triying to run windows updates.
I dont know what to do since I run aida64 bench for 17min at stock v and with 1.25v temps never went over 65c load. May this CPU be deffected ? All the asus suit tunings wont work either.
If i choose Fast tuning, or extreme tuning it wont boot and starts to loop until it gets to windows loading then crash. Any help or bios settings to look for ? I dont consider my self complete noob but maybe i left something out. Vdroop seems to be gone with z87 since its rock solid at what i set in bios and full load.

[GrievingJosh]

Does this happen when the chip is totally stock? Like stock Voltage and Multiplier?