In terms of overall gaming performance, the graphical capabilities of the AMD Radeon R9 M295X 4GB are massively better than the AMD Radeon R9 M365X 4GB.

The R9 M295X has a 225 MHz higher core clock speed and 88 more Texture Mapping Units than the R9 M365X. This results in the R9 M295X providing 83.8 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 R9 M295X has a 225 MHz higher core clock speed and 16 more Render Output Units than the R9 M365X. This results in the R9 M295X providing 17.2 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 R9 M365X was released less than a year after the R9 M295X, and so they are likely to have similar driver support for optimizing performance when running the latest games.

The Radeon R9 M365X 4GB and the Radeon R9 M295X 4GB have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The R9 M295X has 110.3 GB/sec greater memory bandwidth than the R9 M365X, which means that the memory performance of the R9 M295X is massively better than the R9 M365X.

The Radeon R9 M365X 4GB has 640 Shader Processing Units and the Radeon R9 M295X 4GB has 2048. However, the actual shader performance of the R9 M365X is 340 and the actual shader performance of the R9 M295X is 1132. The R9 M295X having 792 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 R9 M365X.

The Radeon R9 M365X 4GB requires 50 Watts to run and the Radeon R9 M295X 4GB requires 125 Watts. The R9 M295X requires 75 Watts more than the R9 M365X 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 R9 M365X.