Late March AMD introduced the Radeon HD 7790, and a week later Nvidia answered with the GeForce GTX 650 Ti Boost. We compared to the two cards, but it wasn't really a fair comparison since the first Radeon HD 7790 cards came with only 1 GB of video memory, while the GeForce GTX 650 Ti Boost has 2 GB. That influenced both price and performance.
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips