Gtx 550 ti vs 7770

Comparing a reference design Radeon HD 7770 GHz Edition to a reference design GeForce GTX 550 Ti the Radeon HD 7770 GHz Edition will have a relative performance of 1.2X that of the GeForce GTX 550 Ti.

NVIDIA adds the Ti designator suffix to their performance-oriented graphics cards.

Yes the Ti refers to the element Titanium which was all the marketing rage back in 2002 when NVIDIA started to label some of their performance-oriented graphics cards with that designation.