It's a .2 increase.. very minor. You better off going with the best CPU you can support. 790's can be odd some of them block off the VGA port and use only the IGPU which works fine up to a i5 2500 but fails on a i7 2600.
intel cpu, first number is the generation number, second to fourth number are related to performance. higher the last three digit (500> 400), more powerful it gets.
It's a .2 increase.. very minor. You better off going with the best CPU you can support. 790's can be odd some of them block off the VGA port and use only the IGPU which works fine up to a i5 2500 but fails on a i7 2600.