In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 8850M v2 are marginally better than the Nvidia GeForce 940MX 2GB.

The GeForce 940MX 2GB has a 597 MHz higher core clock speed but 16 fewer Texture Mapping Units than the HD 8850M. The lower TMU count doesn't matter, though, as altogether the GeForce 940MX 2GB manages to provide 5.9 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 940MX 2GB has a 597 MHz higher core clock speed but 8 fewer Render Output Units than the HD 8850M. The lower ROP count doesn't matter, though, as altogether the GeForce 940MX 2GB manages to provide 0.6 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 GeForce 940MX 2GB was released over a year more recently than the HD 8850M, 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 HD 8850M.

The GeForce 940MX 2GB and the Radeon HD 8850M v2 have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The HD 8850M has 56 GB/sec greater memory bandwidth than the GeForce 940MX 2GB, which means that the memory performance of the HD 8850M is much better than the GeForce 940MX 2GB.

The GeForce 940MX 2GB has 384 Shader Processing Units and the Radeon HD 8850M v2 has 640. However, the actual shader performance of the GeForce 940MX 2GB is 644 and the actual shader performance of the HD 8850M is 464. The GeForce 940MX 2GB having 180 better shader performance is not particularly notable, as altogether the HD 8850M performs better when taking into account other relevant data.

The GeForce 940MX 2GB requires 25 Watts to run and the Radeon HD 8850M v2 requires 45 Watts. The HD 8850M requires 20 Watts more than the GeForce 940MX 2GB to run. The difference is not significant enough for the HD 8850M to have a noticeably larger impact on your yearly electricity bills than the GeForce 940MX 2GB.