Check how much memory it takes,

• Minimum frame rate / Current frame rate * (CPU speed * SpeedUpFactorOf(number of cores in use)),
  
• what level of opengl/directx/cuda your game engine requires from the graphics adaptor,
  
• how much disk space the installation + user info takes...
  

Also test on various hardware configurations.

Check:

• How much RAM it uses
  
• How much texture + GPGPU memory it uses
  
• Minimum frame rate / Current frame rate * CPU speed * SpeedUpFactorOf(minimal number of cores you can use)
  
• Similar equation for GPU calculation units
  
• what level of opengl/directx/cuda your game engine requires from the graphics adaptor
  
• how much disk space the installation + user info takes...
  

Also test on various hardware configurations.

Check how much memory it takes,

• Minimum frame rate / Current frame rate * (CPU speed * numbers of cores you use),
  
• what level of opengl/directx/cuda your game engine requires from the graphics adaptor,
  
• how much disk space the installation + user info takes...
  

Also test on various hardware configurations.

Check how much memory it takes,

• Minimum frame rate / Current frame rate * (CPU speed * SpeedUpFactorOf(number of cores in use)),
  
• what level of opengl/directx/cuda your game engine requires from the graphics adaptor,
  
• how much disk space the installation + user info takes...
  

Also test on various hardware configurations.