computer will turn on for a sec? and turn off please help

Ok the specs on the pc are 6400+ , M2N32 SLI Deluxe mobo, 850W PSU, 8800GT. Now my problem i just put this computer together and when i turn it on it will shut off right away. What can cause the problem ?

Edit: its a new mobo i dont know if it supports 6400+ right out the box ? I bought it at a local shop.

I would say that it is your 4pin CPU power connector, make sure its plugged in. If its not it will cause the computer to immediately shutdown. Also I have that same mobo, and you'll need to update the bios to get a full readout on that CPU, it still works just fine without it, but the bios doesnt completely recognize it. Your problem is probably the CPU power connector being unplugged though.zache86

i checked the jumper, it has two but the book only mentions one. the top one is on the default position the bottom one has 4 posts

same thing happened to me and then the next day my mobo caught fire

i then found out that i didnt put the spacers in (my dad is shipping my mobo as i type :P ) and thats what caused my comp to turn on for a sec then turn off.

so maybe that is the problem adn your mobo is short ciurcuting

^^ that is also a likely cause, did you put standoffs in your case before you installed your Mobo? Check the power connectors first though.zache86

well in my case it had some little bumps so i furgued those were embedded standoffs er spacers (my first build...*sigh*)