In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 1070 are significantly better than the Nvidia GeForce GTX 1050 Ti 4GB.

The GeForce GTX 1070 has a 216 MHz higher core clock speed and 72 more Texture Mapping Units than the GTX 1050 Ti. This results in the GeForce GTX 1070 providing 118.8 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 GeForce GTX 1070 has a 216 MHz higher core clock speed and 32 more Render Output Units than the GTX 1050 Ti. This results in the GeForce GTX 1070 providing 55.1 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 1050 Ti was released less than a year after the GeForce GTX 1070, and so they are likely to have similar driver support for optimizing performance when running the latest games.

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 GeForce GTX 1070 has 4096 MB more video memory than the GTX 1050 Ti, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the GeForce GTX 1070 also has superior memory performance overall.

The GeForce GTX 1070 has 144.2 GB/sec greater memory bandwidth than the GTX 1050 Ti, which means that the memory performance of the GeForce GTX 1070 is massively better than the GTX 1050 Ti.

The GeForce GTX 1050 Ti 4GB has 768 Shader Processing Units and the GeForce GTX 1070 has 1920. However, the actual shader performance of the GTX 1050 Ti is 1443 and the actual shader performance of the GeForce GTX 1070 is 4362. The GeForce GTX 1070 having 2919 better shader performance and an altogether better performance when taking into account other relevant data means that the GeForce GTX 1070 delivers a massively smoother and more efficient experience when processing graphical data than the GTX 1050 Ti.

The GeForce GTX 1050 Ti 4GB requires 75 Watts to run and the GeForce GTX 1070 requires 150 Watts. We would recommend a PSU with at least 300 Watts for the GTX 1050 Ti and a PSU with at least 500 Watts for the GeForce GTX 1070. The GeForce GTX 1070 requires 75 Watts more than the GTX 1050 Ti to run. The difference is significant enough that the GeForce GTX 1070 may have an adverse affect on your yearly electricity bills in comparison to the GTX 1050 Ti.