I just put together a new build with a crappy no-name-madeinchina "650w" [put weighed a feather] psu today. The system turned on, a few seconds later, shut down. Then on. Then off. and so on...
I thought it was hockey puck psu but when I swapped it out with an Ultra 650w the same thing happened.
Please tell me this is not my mobo, if it was my mobo then I guess it was DOA .
I even tried putting the memory in different slots to see if that helped and it didn't.