To find out what may be causing the problem.
Please post all of the components of your PC.
Cpu, Motherboard brand and model name, memory config, speed.
And brand of power supply and wattage rating.
If you previously used on board video of the motherboard, or had a different model of graphics card in your system before you fitted your Msi GTX 970 graphics card.
Make sure you remove any old graphics card drivers from windows, including any that may of been installed for the graphics solution if the motherboard has on board graphics.
Click on the link bellow, and download this software, and install it.
Run the program to remove all video drivers in windows.
http://www.guru3d.com/content-page/guru3d-driver-sweeper.html
Restart your system.
Get the latest revision of the GTX 970 driver from the Nvidia website and install it.
Make sure you have the latest version of direct X also installed on your system.