In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 7640G + HD 7610M Dual are noticeably better than the Nvidia GeForce GT 550M 2GB.

The GT 550M has a 290 MHz higher core clock speed than the HD 7640G, but the HD 7640G has 20 more Texture Mapping Units than the GT 550M. As a result, the HD 7640G exhibits a 4.4 GTexel/s better Texture Fill Rate than the GT 550M. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GT 550M has a 290 MHz higher core clock speed than the HD 7640G, but the HD 7640G has 12 more Render Output Units than the GT 550M. As a result, the HD 7640G exhibits a 4.2 GPixel/s better Pixel Fill Rate than the GT 550M. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The HD 7640G was released over a year more recently than the GT 550M, and so the HD 7640G is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the GT 550M.

The GT 550M has 1024 MB more video memory than the HD 7640G, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the GT 550M also has superior memory performance overall.

The memory bandwidth of the Radeon HD 7640G + HD 7610M Dual and the GeForce GT 550M 2GB are the same, which means the HD 7640G and the GT 550M have equal limitations when it comes to graphical data transfer.

The Radeon HD 7640G + HD 7610M Dual has 656 Shader Processing Units and the GeForce GT 550M 2GB has 96. However, the actual shader performance of the HD 7640G is 430 and the actual shader performance of the GT 550M is 142. The HD 7640G having 288 better shader performance and an altogether better performance when taking into account other relevant data means that the HD 7640G delivers a marginally smoother and more efficient experience when processing graphical data than the GT 550M.

The HD 7640G transistor size technology is 12 nm (nanometers) smaller than the GT 550M. This means that the HD 7640G is expected to run slightly cooler and achieve higher clock frequencies than the GT 550M.

The GeForce GT 550M 2GB requires 35 Watts to run but there is no entry for the HD 7640G.