Tried different socket as well, and a different house just in case. Still tries to power on, then dies in less than a second. Only thing I can think of is the board I just got is bad. But having the exact same problem seems highly unlikely. I"m using a rampage formula, using the start button and my 750 watt PSU, if I button mash the start button on the mobo, everything will power up, but it won't boot. On my 1kw, can't get it to happen.