title: How to enable/disable a specific graphic card?
body: <p>I'm working on a "fujitsu" machine. It has 2 GPUs installed: Quadro 2000 and Tesla C2075. The Quadro GPU has 1 GB RAM and Tesla GPU has 5GB of it. (I checked using the output of nvidia-smi -q). When I run nvidia-smi, the output shows 2 GPUs, but the Tesla ones display is shown as off. 
  I'm running a memory intensive program and would like to use 5 GB of RAM available, but whenever I run a program, it seems to be using the Quadro GPU.
  Is there some way to use a particular GPU out of the 2 in a program? Does the Tesla GPU being "disabled" means it's drivers are not installed?</p>