Clevo P570WM can't overclock Xeon E5-1680 v2 to 4GHz and beyond

[SuperMG]

Hello.

 

I can't overclock this CPU to 4GHz and beyond.

 

It's an unlocked 8 cores CPU for the X79 chipset.

 

My laptop has dual fan and good heatsink for that CPU. It has the PremaMod V5 bios.

 

I use the BIOS overclock ratio, it only shows 6 cores instead of 8.

 

So I overclock all cores to 42x, 43x and even 50x but I'm stuck at 39x for single thread and 38x for multi-thread.

 

The current limit is 165A and power limit is 200W. I use 2x330W PSU. 

 

I tried to use Intel XTU 4.1 and 5.1 but they all throw a blue screen of death "iocbios2.sys".

 

Why can't I get 4.0GHz and above like everyone else?