Power supply question
 

Is therea utility that can detect waht power supply the pc has? I want to run a vid card that wont damage the pc.

The power supply's rating should be listed on the sticker on the side of it, in watts.

The easiest way to find out what PSU you have is to look at the back of the case near where the power cable plugs in.... most have the wattage printed there. If not then you'll have to open your case to see this (make sure you unplag the computer from power surply before opening your case. just to be safe).

I dont think there is any software able to detect the PSU (power surply unit).

If i get the gist of the OP's qstn, always look on your proposed GPU's website and look at what they recommend...
Straight from the horses mouth, so to speak.
My GPU recommends a min 550W PSU, i went for a 750W, for extra "juice", when needed.