Nah i don't think that both psu have problem... i returned the toughpower 1200w to my friend, and he put it on his system, it works fine...we 've tested mine to his system too, no problem... Most probably, the m/b is defective.. That is exactly what i was talking about... My board does nothing of what you said about the Leds ... I'll try something that came in my mind now, and i'll get back tommorow..Thank you guys