Asus z87-pro 4-way optimization BSOD

I recently just built my first computer with the Asus z87-pro and intel i5 4670k and it's been up and running for 2 days now, running pretty much perfectly. 
However I decided I would try out that 4-way optimzation in the asus suite III software and when I did it BSOD during the first part called TPU where it stress tests the cores. I'm using a cooler master hyper 212 evo if that matters.
So anyway what is causing it? obviously I think cpu is getting to hot or something like that but should that cooler be enough for this? Or is it a defected cpu that is unstable?
I did do the standard cpu stress test in cinebench program and it passed that. Havn't tried prime 95 cause not sure how to use that. 

probably bad auto tune.. it's not flawless.. it probably changed your base clock and introduced instability. i'd disable it and default the bios. see if your machine runs normal. if you still want to overclock afterwards raise the cpu multiplier by 1 in bios until you get the results you want.. that is an easy and safe overclock for haswell on air.

Yeah but they did tests with the i5 4670k right? they tested all these stock cpu's to see when you did the 4-way optimization it would work. So why isn't mine working? Something has to be defected, the board advertises it, so shouldn't it work?

the system is supposed to BSOD, that's how it knows that the system is unstable and then it backs off a bit

From the videos i've seen of it being done when it reaches that point the computer gracefully restarts, it doesn't crash to a blue screen. Also my computer becomes unstable so I have to switch back to default cpu settings.

well hasswell runs extreme hot  cooler master hyper EVO 212 is not a cooler whats made for that. its just a cooler to keep a cPU a little bit cooler at stock speeds, but nothing much more then that. especialy on hasswell. you probably need a better cpu cooler. monitor the temps if you use  4 way optimization.