ATI Radeon X1650 Pro (PowerColor) Black Screen

I finally got an ATI Radeon X1650 Pro purchased ...

Only, unfortunately, after about 5-10 minutes Suddenly my picture standing up and then it will be black and then starts my pc automatically restarts. This occurs only in PC games!

On the wiring, it can not also driver software and the rest are installed correctly.

However, I have the settings in the Control Program (Catalyst - Control Center - Base [Version 8.3] on the standard respectively.

But I want know, why the image always stand still and Pc resarts .

Please help

what are the temperatures?

what a power supply is installed? Do you have any other power supply?

At the temperatures, I can say nothing, but since it is a new card, I assume they are ok ...

As a PSU, I have a 550 watt power supply installed.

Also supplies electricity for Amd Athlon 6000 + X2, and 2 hard disks and a drive should be the total consumption without graphic card at 350 watts

I have just a little at the driver change.

So my problem is that my graphics driver in an infinite loop is located.