In terms of overall gaming performance, the graphical capabilities of the AMD Radeon Sky 700 are very slightly better than the Nvidia GeForce GTX 460 SLI.

The Radeon Sky 700 was released over a year more recently than the GTX 460, and so the Radeon Sky 700 is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the GTX 460.

Both GPUs exhibit very powerful performance, so it probably isn't worth upgrading from one to the other, as both are capable of running even the most demanding games at the highest settings.

The Radeon Sky 700 has 4096 MB more video memory than the GTX 460, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the Radeon Sky 700 also has superior memory performance overall.

The Radeon Sky 700 has 33.6 GB/sec greater memory bandwidth than the GTX 460, which means that the memory performance of the Radeon Sky 700 is noticeably better than the GTX 460.

The GeForce GTX 460 SLI has 672 Shader Processing Units and the Radeon Sky 700 has 1792. However, the actual shader performance of the GTX 460 is 907 and the actual shader performance of the Radeon Sky 700 is 1048. The Radeon Sky 700 having 141 better shader performance is not particularly notable, as altogether the GTX 460 performs better when taking into account other relevant data.

The GeForce GTX 460 SLI requires 380 Watts to run and the Radeon Sky 700 requires 225 Watts. We would recommend a PSU with at least 600 Watts for the GTX 460. The GTX 460 requires 155 Watts more than the Radeon Sky 700 to run. The difference is significant enough that the GTX 460 may have an adverse affect on your yearly electricity bills in comparison to the Radeon Sky 700.