I have a core i5-2500, 8gb ram, a gtx 560, 2 hard disks (250 & 500 gbs, 5 & 4 years old resp.) on an intel h67vr (i know, poor choice for mobo, was careless) and with seasonic 620 for smps.
Anyway, I turned on my pc today, and it would just go on this on/off loop, showing motherboard logo each...