I recently purchased a thinkpad p50s and decided to put centos on, but now the computer is not using the dedicated nvidia card. How can I fix this?
Centos 7 isn't using my dedicated graphics card
centos;graphics;graphic card
If you want to use the third party NVidia driver, I suggest you avoid using the .run file, and use the ELRepo repository.  Follow these instructions to get the nvidia-detect package.  Then run yum install $(nvidia-detect), which should install the appropriate driver on your system.(nvidia-detect looks up which driver is appropriate for the hardware you have.)