In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 680 Galaxy Edition are massively better than the Nvidia GeForce GTX 750 Zotac Thunderbolt 1GB Edition.

The GTX 750 has a 119 MHz higher core clock speed than the GTX 680, but the GTX 680 has 96 more Texture Mapping Units than the GTX 750. As a result, the GTX 680 exhibits a 102.8 GTexel/s better Texture Fill Rate than the GTX 750. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GTX 750 has a 119 MHz higher core clock speed than the GTX 680, but the GTX 680 has 16 more Render Output Units than the GTX 750. As a result, the GTX 680 exhibits a 15.8 GPixel/s better Pixel Fill Rate than the GTX 750. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The GTX 750 was released over a year more recently than the GTX 680, and so the GTX 750 is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the GTX 680.

The GTX 680 has 3072 MB more video memory than the GTX 750, 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 105.9 GB/sec greater memory bandwidth than the GTX 750, which means that the memory performance of the GTX 680 is massively better than the GTX 750.

The GeForce GTX 750 Zotac Thunderbolt 1GB Edition has 512 Shader Processing Units and the GeForce GTX 680 Galaxy Edition has 1536. However, the actual shader performance of the GTX 750 is 912 and the actual shader performance of the GTX 680 is 1806. The GTX 680 having 894 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 GTX 750.

The GeForce GTX 750 Zotac Thunderbolt 1GB Edition requires 55 Watts to run and the GeForce GTX 680 Galaxy Edition requires 195 Watts. We would recommend a PSU with at least 300 Watts for the GTX 750 and a PSU with at least 550 Watts for the GTX 680. The GTX 680 requires 140 Watts more than the GTX 750 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 GTX 750.