4gb or 2 gb CPU?

Solution
The 4 gig card will have more vram which is nicer for higher tier games, 2 gigs will not be ideal for trying to play say Battlefield 4 on Ultra. The SSC sounds like you're looking at an EVGA card so SC= Superclocked, SSC= Super Superclocked, and FTW= For The Win. It has a higher clock so it will be faster than a stock chip that hasn't been over clocked at all.
The 4 gig card will have more vram which is nicer for higher tier games, 2 gigs will not be ideal for trying to play say Battlefield 4 on Ultra. The SSC sounds like you're looking at an EVGA card so SC= Superclocked, SSC= Super Superclocked, and FTW= For The Win. It has a higher clock so it will be faster than a stock chip that hasn't been over clocked at all.
 
Solution