It has been 3 day since my request on the support and still no answer, so I'm posting it here.
Here's my problem :
My power supply G550M is defective ! I bought a Cooler master G550M last week and since I start using my computer with it, my PC shutdowns randomly (even when nothing runs on my computer). My BIOS says "Power supply surges detected during the previous power on" at the reboot.So I replaced the power supply by another one(550W too) and everything is fine now ! so i guess my cooler master G550M is defective and i'd like to have a new one...
sincerely, Willens Alexis
(sorry for my bad english)
(Config PC : Asus H87-Pro / Intel i7-4770-3,4GHZ /MSI GeForce GTX 770 Twin Frozr OC GAMING, 2 Go / Kit dual Channel DDR3 Corsair Vengeance, 2 x 4 Go, PC3-12800, CAS 9 / Disque dur Western Digital Caviar Blue, 1 To / graveur DVD interne )