In terms of overall gaming performance, the graphical capabilities of the AMD Radeon R9 M295X 4GB are massively better than the Nvidia GeForce 940MX 2GB.

The GeForce 940MX 2GB has a 272 MHz higher core clock speed than the R9 M295X, but the R9 M295X has 104 more Texture Mapping Units than the GeForce 940MX 2GB. As a result, the R9 M295X exhibits a 81.9 GTexel/s better Texture Fill Rate than the GeForce 940MX 2GB. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GeForce 940MX 2GB has a 272 MHz higher core clock speed than the R9 M295X, but the R9 M295X has 24 more Render Output Units than the GeForce 940MX 2GB. As a result, the R9 M295X exhibits a 18.2 GPixel/s better Pixel Fill Rate than the GeForce 940MX 2GB. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The GeForce 940MX 2GB was released over a year more recently than the R9 M295X, and so the GeForce 940MX 2GB is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the R9 M295X.

The R9 M295X has 2048 MB more video memory than the GeForce 940MX 2GB, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the R9 M295X also has superior memory performance overall.

The R9 M295X has 158.3 GB/sec greater memory bandwidth than the GeForce 940MX 2GB, which means that the memory performance of the R9 M295X is massively better than the GeForce 940MX 2GB.

The GeForce 940MX 2GB has 384 Shader Processing Units and the Radeon R9 M295X 4GB has 2048. However, the actual shader performance of the GeForce 940MX 2GB is 644 and the actual shader performance of the R9 M295X is 1132. The R9 M295X having 488 better shader performance and an altogether better performance when taking into account other relevant data means that the R9 M295X delivers a massively smoother and more efficient experience when processing graphical data than the GeForce 940MX 2GB.

The GeForce 940MX 2GB requires 25 Watts to run and the Radeon R9 M295X 4GB requires 125 Watts. The R9 M295X requires 100 Watts more than the GeForce 940MX 2GB to run. The difference is significant enough that the R9 M295X may have an adverse affect on your yearly electricity bills in comparison to the GeForce 940MX 2GB.