MSI GTX 660 (non-ti) or Sapphire 7870?

[IamNewie]

Which one is better ? i would be playing on 1600x900 or should I use better or lower resolution? people says that MSI is good with overclocking , what about sapphire? does both of them good for overclocking?

 

[swifty_morgan]

660 all night long.