weird PC behavior on startup

[z0rr0w]

So the deal is, whenever i power on my PC it will start all fans light all LED's and start the HDD, but after 1-2 seconds it powers all off again for some 4-5 seconds before it starts up again and finishes the boot. I really dont know what the porblem is as i have a 850w gold PSU and my i7-4770k is stable at 4.5 GHz at a 24 hour stresstest.
Relevant specs:
I7-4770k@4.5GHz
Asus maximus VI hero
Corsair RM850w 80 gold +
2x8Gb 2400MHz Corsair vengance pro ram

hope some of you guys know what's going on, because i've never heard of it before   

[AGGELOS_970]

Hmmm... No idea why this is happening..

Maybe you did something in the BIOS lately ? Or just just search in the BIOS for a option that may causing it..

I have never heard something similar so I don't know what else you could try.

[LogicalDrm]

I'd say its normal boot-up testing that PSU and mobo use to see if OC is working. I read lots of these problems coming with Corsairs PSUs so it might be their safety feature. For me it does such only after crashing whole PC and after cold boots.

[z0rr0w]

Yeah forgift to mention it only does so when the power has been Cut, not when it just Got turned off

[LogicalDrm]

Yeah forgift to mention it only does so when the power has been Cut, not when it just Got turned off

 

Then its definetly just PSU selftesting.

[FreezeFlyte]

As already stated Corsair psu tend to due a self test if the cpu is pulling more power than the stock voltage. Mine does the same thing since i have mine overclocked as well. So far there has been no damage when it runs the self test.