Well, I will not go through four way and given my experience I say that this is a power supply Bouze. Let me explain: in one year it fell down twice! So Corsair ensures and exchange directly but € 27 port each time to return the invoice is salty ... The failure is the same: the power supply, after tensioning, putting more and longer before powering the motherboard and thus before the start of the PC. After a while, it takes more than ten minutes. Returned after less than 4 months of use, it took much longer for the second copy is found suffering from the same problem.
I sold the third live!