In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 7640G are very slightly better than the Intel HD Graphics Mobile (Broadwell).

The Radeon HD 7640G has a 196 MHz higher core clock speed and 12 more Texture Mapping Units than the Graphics Mobile. This results in the Radeon HD 7640G providing 6.7 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 Radeon HD 7640G has a 196 MHz higher core clock speed and 6 more Render Output Units than the Graphics Mobile. This results in the Radeon HD 7640G providing 3.4 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 Graphics Mobile was released over a year more recently than the Radeon HD 7640G, and so the Graphics Mobile is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the Radeon HD 7640G.

The HD Graphics Mobile (Broadwell) and the Radeon HD 7640G have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The memory bandwidth of the HD Graphics Mobile (Broadwell) and the Radeon HD 7640G are the same, which means the Graphics Mobile and the Radeon HD 7640G have equal limitations when it comes to graphical data transfer.

The HD Graphics Mobile (Broadwell) has 12 Shader Processing Units and the Radeon HD 7640G has 256. However, the actual shader performance of the Graphics Mobile is 10 and the actual shader performance of the Radeon HD 7640G is 127. The Radeon HD 7640G having 117 better shader performance and an altogether better performance when taking into account other relevant data means that the Radeon HD 7640G delivers a marginally smoother and more efficient experience when processing graphical data than the Graphics Mobile.

The Graphics Mobile transistor size technology is 10 nm (nanometers) smaller than the Radeon HD 7640G. This means that the Graphics Mobile is expected to run very slightly cooler and achieve higher clock frequencies than the Radeon HD 7640G. While they exhibit similar graphical performance, the Graphics Mobile should consume less power than the Radeon HD 7640G.

The HD Graphics Mobile (Broadwell) requires 4 Watts to run and the Radeon HD 7640G requires 35 Watts. The Radeon HD 7640G requires 31 Watts more than the Graphics Mobile to run. The difference is significant enough that the Radeon HD 7640G may have a slight adverse affect on your yearly electricity bills in comparison to the Graphics Mobile.