Click on the Apple button on the top left corner, and click "about this Mac".
A window with the specs of your Mac should appear.
For Windows
Type dxdiag in the search bar in the Windows menu and click dxdiag.
Click on the "Display" tab of the dxdiag window to see your graphics card information.
Dead Effect 2
BadFly Interactive, a.s.
 53
Minimum:
3460
CPU: 
Intel Core i5-2400 - AMD FX-6100
GPU: 
NVIDIA GeForce GTX 560 with 2 GB VRAM / NVIDIA GeForce GTX 760 - AMD Radeon HD 7770 with 2 GB VRAM
Click on the Apple button on the top left corner, and click "about this Mac".
A window with the specs of your Mac should appear.
For Windows
Type dxdiag in the search bar in the Windows menu and click dxdiag.
Click on the "Display" tab of the dxdiag window to see your graphics card information.