Is my new Graphic Card cause for my PC hanging?

The onboard video is ATI (now owned by AMD), and you're trying to install an NVidia card. It will work, but it's not as simple as plug and play.

First, you need to unistall the drivers for your onboard video. Your new video card shouldn't be installed during this process.

Next, you need to disable onboard video in BIOS, or at least set it to secondary. If you can get into the BIOS settings with your new card installed, do that.

Finally, you should be able to boot into your OS to install the drivers for you new card. Initially, you'll probably be in limited in the screen resolutions supported.

Your computer should be compatible with this graphics card.

You can't rule out BIOS updates. There are updates all the time to incrase compatibility or offer new features. Without seeing the changelog from your version to the latest, you really can not rule it out at all.... unfortunately in your case it did not help.

Based on the fact it worked in other machines, all I can say is it could possibly be a power issue and the card crashing. You may want to try a new power unit.

Also, take a look in your BIOS and see if you can choose between on board and PCI Express graphics as it may not be selecting the correct adapter.