EVGA P55V no video shortly after booting

[mercury01]

Hi. i have this system

Evga P55V
i5 750
GSkill ripjaws DDR3-1333 2x2GB
Caviar Blue 250GB
Antec TruePower 550W

The motherboard's boots. I see the POST splash screen and up to the Windows 7 login screen. Shortly after I log in, the video cuts out and monitor says that there's no video input.

What's wrong?

 

[dmill89]

Is that antec truepower an original truepower or a truepower trio/ truepower new?
What video card do you have?