Hi!

First, I recommend you try the troubleshooting steps on this article to confirm if the problem is related to hardware.

If issue persists and the video card needs to be replaced, below you'll find the validated video cards for the M15X.

Hi Arraysix, the selection the Naomi posted are correct, but you can also use other cards too, as long as your power supply can handle it.

You will have to do a few minor adjustments to the driver to get it to install, but that only takes 5 minutes and there are lots of tutorials.

In your position I'd probably look at:

2GB AMD/ATI 6970M or 6990M

2GB NVidia GTX 580M or 675M (I'd say GTX680, but not sure if a M15x power supply will be enough)

All depends what your budget is..........