In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 680 Galaxy Edition are significantly better than the AMD Radeon HD 7750 Crossfire.

The GTX 680 has a 310 MHz higher core clock speed and 64 more Texture Mapping Units than the HD 7750. This results in the GTX 680 providing 90.9 GTexel/s better texturing performance. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GTX 680 has a 310 MHz higher core clock speed than the HD 7750 and the same number of Render Output Units. This results in the GTX 680 providing 9.9 GPixel/s better pixeling performance. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The GTX 680 was released less than a year after the HD 7750, and so they are likely to have similar driver support for optimizing performance when running the latest games.

The GTX 680 has 2048 MB more video memory than the HD 7750, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the GTX 680 also has superior memory performance overall.

The GTX 680 has 48.3 GB/sec greater memory bandwidth than the HD 7750, which means that the memory performance of the GTX 680 is noticeably better than the HD 7750.

The Radeon HD 7750 Crossfire has 1024 Shader Processing Units and the GeForce GTX 680 Galaxy Edition has 1536. However, the actual shader performance of the HD 7750 is 696 and the actual shader performance of the GTX 680 is 1806. The GTX 680 having 1110 better shader performance and an altogether better performance when taking into account other relevant data means that the GTX 680 delivers a massively smoother and more efficient experience when processing graphical data than the HD 7750.

The Radeon HD 7750 Crossfire requires 110 Watts to run and the GeForce GTX 680 Galaxy Edition requires 195 Watts. We would recommend a PSU with at least 500 Watts for the HD 7750 and a PSU with at least 550 Watts for the GTX 680. The GTX 680 requires 85 Watts more than the HD 7750 to run. The difference is significant enough that the GTX 680 may have an adverse affect on your yearly electricity bills in comparison to the HD 7750.