Find out if you are on such system run this from terminal:
lspci -vnn | grep '\''[030\]'
if it gives out something like this with two devices:
00:02.0 VGA compatible controller : Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 09) (prog-if 00 [VGA controller])
01:00.0 3D controller : NVIDIA Corporation GK107M [GeForce GT 750M] [10de:0fe4] (rev ff) (prog-if ff)
it will be that you have such hybrid system with a combination of nvidia and intel gpu.
Some basic information on that: https://wiki.archlinux.org/index.php/Hybrid_graphics
If so and your nvidia gpu is supported by the latest nvidia driver there are some different ways to handle a switch between gpus or simple only use one of them:
Optimus-manager is one solution currently where you can switch between the two GPU’s:
Optimus Switch is completely powerdown Nvidia GPU and will save more power, but needs to reboot system to do so:
Render Offload is a new mechanism build inside the Nvidia Driver:
Bumblebee is the very first Linux implementation to switch and manage Optimus systems GPU’s, but is not working on newer systems: