In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 980 Ti Zotac AMP! 6GB Edition are significantly better than the Nvidia GeForce GTX 770 Zotac AMP! Edition.

The GTX 770 has a 99 MHz higher core clock speed than the GTX 980 Ti, but the GTX 980 Ti has 48 more Texture Mapping Units than the GTX 770. As a result, the GTX 980 Ti exhibits a 37.8 GTexel/s better Texture Fill Rate than the GTX 770. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GTX 770 has a 99 MHz higher core clock speed than the GTX 980 Ti, but the GTX 980 Ti has 64 more Render Output Units than the GTX 770. As a result, the GTX 980 Ti exhibits a 64.1 GPixel/s better Pixel Fill Rate than the GTX 770. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The GTX 980 Ti was released over a year more recently than the GTX 770, and so the GTX 980 Ti is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the GTX 770.

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 GTX 980 Ti has 4096 MB more video memory than the GTX 770, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the GTX 980 Ti also has superior memory performance overall.

The GTX 980 Ti has 106.2 GB/sec greater memory bandwidth than the GTX 770, which means that the memory performance of the GTX 980 Ti is massively better than the GTX 770.

The GeForce GTX 980 Ti Zotac AMP! 6GB Edition has 2816 Shader Processing Units and the GeForce GTX 770 Zotac AMP! Edition has 1536. However, the actual shader performance of the GTX 980 Ti is 4334 and the actual shader performance of the GTX 770 is 1846. The GTX 980 Ti having 2488 better shader performance and an altogether better performance when taking into account other relevant data means that the GTX 980 Ti delivers a massively smoother and more efficient experience when processing graphical data than the GTX 770.

The GeForce GTX 980 Ti Zotac AMP! 6GB Edition requires 250 Watts to run but there is no entry for the GeForce GTX 770 Zotac AMP! Edition. We would recommend a PSU with at least 600 Watts for the GTX 980 Ti and a PSU with at least 600 Watts for the GTX 770. The two GPUs have been recommended a PSU with the same amount of wattage. As such, there is no need to worry about which will more significantly affect your yearly electricity bills.