My computer turns on and then straight back off

Hi, I bought all my PC parts 2 days ago here are the specifications

MotherBoard:ASUS P8Z77-V LX
CPU: Intel Core I3 3.3Mhz
GPU: GeForce GTX 650 2GB SuperClocked
Ram: 2x4 GB kingston ram sticks
Hard Drive: 1TB Western Digital Caviar Blue
Power Supply: ULTRA LSP 550W ATX power supply
Computer Case(if it helps): Corsair Carbide 300R

Issue: when it was fully assembled (I followed the guide) I tried turning it on and the fans moved and it turned on for 1 second literally and then turned right back off, I know I didn't shorten it because i was doing it on a tile floor wearing a shockless bracelet, it did not over heat because it was never turned on before it is all brand new.

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More about computer turns straight back
  1. make and model of the psu?
  2. ULTRA LSP 550W ATX power supply
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