In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 770 Zotac AMP! Edition are significantly better than the AMD Radeon Sky 500.

The GTX 770 was released less than a year after the Radeon Sky 500, and so they are likely to have similar driver support for optimizing performance when running the latest games.

The Radeon Sky 500 has 2048 MB more video memory than the GTX 770, so is likely to be much better at displaying game textures at higher resolutions. However, overall, the GTX 770 has superior memory performance.

The GTX 770 has 76.8 GB/sec greater memory bandwidth than the Radeon Sky 500, which means that the memory performance of the GTX 770 is much better than the Radeon Sky 500.

The GeForce GTX 770 Zotac AMP! Edition has 1536 Shader Processing Units and the Radeon Sky 500 has 1280. However, the actual shader performance of the GTX 770 is 1846 and the actual shader performance of the Radeon Sky 500 is 790. The GTX 770 having 1056 better shader performance and an altogether better performance when taking into account other relevant data means that the GTX 770 delivers a massively smoother and more efficient experience when processing graphical data than the Radeon Sky 500.

The Radeon Sky 500 requires 150 Watts to run but there is no entry for the GTX 770. We would recommend a PSU with at least 600 Watts for the GTX 770.