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".

 

I tried lower speed RAM and I still have the same issue.

 

Why can't I get 4.0GHz and above like everyone else? I know two people who got 4.3GHz and 4.5GHz... how?

 

[SuperMG]

I dropped the core count to 6.

 

I was able to reach 4.0GHz all cores and 4.1GHz single but crashes in TS bench. I raise voltage by +100mV but it still runs at 1.23V...

 

But when I want to go higher than 4GHz, bios doesn't allow and restarts.

 

Is the CPU a bad one? Never got any problems at 3.8GHz all cores 

 

 

Edit: switching from 6 cores mode back to 8 cores, destroyed the CPU!

 

It does lots of error at 3.4GHZ!!! IN TS bench.

 

Wow at least I paid like 30€ back then but wow.

 

Guys, this CPU is dead yes? Or is the motherboard dead?