I have bought (second hand) a Abit N68SV with a AMD X2 7750 processor on it. I tried to start up my system using a old 300 W power supply. The result is that I don't get anything on the monitor, when I start the computer. So I am wondering whether the problem could be with the power supply just not being strong enough to start the system. However everything seems to be ok when I start, as the CPU fan is running all the time, while powered.