It won't run new games on high settings at all. Putting 4 gig of RAM in that card is pure marketing numbers. No game that will need 4 gig of RAM will run on a 730 properly. It's like putting a $10,000 set of wheels and tires and new paint on a $3,000 Toyota Corolla.
If you only have the budget to get the 730, that is a fine low end card for lower quality gaming. If you want to play new games on high settings, you need to spend about $150 or more depending on the resolution you want to run at.