Installing and Updating to the newest Nvidia driver has always been a frustration for me.  When I looked up step-by-step tutorials they included a lot of Terminal steps where one missed step can cause your system to be completely unusable.
Mint 17.3 has a simple way to update drivers with only a few clicks
Launch Mint Update Manager
Click Edit
Click Software sources
		
		
	
	
		
	 
Click PPA's button on the left side
Click "Add a new PPA..."
		
	 
Paste this Graphics Drivers PPA:
	
	
	
		
Click OK
		
	 
Read up on this PPA notes
Click OK
		
	 
Click "Update the cache" on the top right
		
	 
Updating will include the new Graphics Drivers repository in your updates
		
	 
Close Update Manager
Launch Driver Manager
	
	
	
		
		
	 
Driver Manager will automatically update cache
		
	 
Check the newest Nvidia driver available for your GeForce card
Click "Apply Changes" bottom left
		
	 
Wait while it downloads and installs
Click Restart or just restart Mint from the Menu
After restarting confirm the driver is installed by opening Nvidia X Server Settings
	
	
	
		
				
			Mint 17.3 has a simple way to update drivers with only a few clicks
Launch Mint Update Manager
Click Edit
Click Software sources
Click PPA's button on the left side
Click "Add a new PPA..."
Paste this Graphics Drivers PPA:
		Code:
	
	ppa:graphics-drivers/ppa
	Read up on this PPA notes
Click OK
Click "Update the cache" on the top right
Updating will include the new Graphics Drivers repository in your updates
Close Update Manager
Launch Driver Manager
		Code:
	
	Menu/Administration/Driver Manager
	Driver Manager will automatically update cache
Check the newest Nvidia driver available for your GeForce card
Click "Apply Changes" bottom left
Wait while it downloads and installs
Click Restart or just restart Mint from the Menu
After restarting confirm the driver is installed by opening Nvidia X Server Settings
		Code:
	
	Menu/Administration/Nvidia X Server Settings