I built a new PC from the following components:
- CPU: Intel Core i7 950
- MB: Gigabyte X58A-UD3R
- RAM: 2x2gb i7 Corsair memory
- VGA: Zotac AMP2 GTX260
- HDD: 1 GreenSATA HDD (Western Digital 500gb RE2)

When I turn it on, it goes for a few seconds, fans at maximum speed, then turns off.
The again, it starts by itself.. and goes with fans on max speed, nothing happens.

First I suspected my PSU. It's a Chieftec 450AA PSU.
After I borrowed a Chieftec 550AA PSU, I tried to start with that.

Exact same story.
Any idea ? Do I need a bigger PSU?

Reason why its not localized. I never seen this turn on, off, on.
If you give answer for that, it would already help people like me, with the same problem.


Maybe your RAM sticks are faulty. You should try unplugging them and plugging them back.

Also, I suggest you check every cable connection between the motherboard and the components.

EDIT: Does your BIOS make any beeping noise? It may be notifying you of a problem. Here are databases for AMI Bios, Award and Phoenix

  • I'll try it with other sticks, lucky that my friend got DDR3 too. About the cables.. they are connected. – Apache Jan 3 '11 at 15:18
  • Sorry if I didn't express myself correctly. By checking the cables, I suggest you unplug and plug them back again firmly. – bruno077 Jan 3 '11 at 15:22
  • Oh the beep is a good idea. Completely forgot about the PC speakers. :) – Apache Jan 3 '11 at 15:25
  • They were installed in a wrong order. A guy helped me out, the manual was wrong.. just a little bit lol. Thanks for the idea and sorry for the late accept! – Apache Feb 18 '11 at 9:28
  • I'm glad you could solve it! – bruno077 Feb 18 '11 at 12:20

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