In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 950M 2GB are very slightly better than the Nvidia GeForce GT 750M SLI.

The GT 750M has a 53 MHz higher core clock speed and 24 more Texture Mapping Units than the GTX 950M. This results in the GT 750M providing 25.3 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 GT 750M has a 53 MHz higher core clock speed and 16 more Render Output Units than the GTX 950M. This results in the GT 750M providing 16.3 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 950M was released over a year more recently than the GT 750M, and so the GTX 950M is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the GT 750M.

The GT 750M has 2048 MB more video memory than the GTX 950M, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the GT 750M also has superior memory performance overall.

The GT 750M has 80 GB/sec greater memory bandwidth than the GTX 950M, which means that the memory performance of the GT 750M is much better than the GTX 950M.

The GeForce GTX 950M 2GB has 640 Shader Processing Units and the GeForce GT 750M SLI has 768. However, the actual shader performance of the GTX 950M is 858 and the actual shader performance of the GT 750M is 743. The GTX 950M having 115 better shader performance is not particularly notable, as altogether the GT 750M performs better when taking into account other relevant data.

The GeForce GTX 950M 2GB requires 50 Watts to run and the GeForce GT 750M SLI requires 80 Watts. The GT 750M requires 30 Watts more than the GTX 950M to run. The difference is not significant enough for the GT 750M to have a noticeably larger impact on your yearly electricity bills than the GTX 950M.