In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 7770M are very slightly better than the Nvidia GeForce GT 445M v2.

The Radeon HD 7770M has a 105 MHz higher core clock speed and 8 more Texture Mapping Units than the GT 445M. This results in the Radeon HD 7770M providing 7.9 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 Radeon HD 7770M has a 105 MHz higher core clock speed than the GT 445M and the same number of Render Output Units. This results in the Radeon HD 7770M providing 1.7 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 Radeon HD 7770M was released over a year more recently than the GT 445M, and so the Radeon HD 7770M is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the GT 445M.

The Radeon HD 7770M and the GeForce GT 445M v2 have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The Radeon HD 7770M has 24 GB/sec greater memory bandwidth than the GT 445M, which means that the memory performance of the Radeon HD 7770M is slightly better than the GT 445M.

The Radeon HD 7770M has 512 Shader Processing Units and the GeForce GT 445M v2 has 144. However, the actual shader performance of the Radeon HD 7770M is 294 and the actual shader performance of the GT 445M is 164. The Radeon HD 7770M having 130 better shader performance and an altogether better performance when taking into account other relevant data means that the Radeon HD 7770M delivers a noticeably smoother and more efficient experience when processing graphical data than the GT 445M.

The Radeon HD 7770M transistor size technology is 12 nm (nanometers) smaller than the GT 445M. This means that the Radeon HD 7770M is expected to run slightly cooler and achieve higher clock frequencies than the GT 445M. While they exhibit similar graphical performance, the Radeon HD 7770M should consume less power than the GT 445M.

The Radeon HD 7770M requires 32 Watts to run and the GeForce GT 445M v2 requires 35 Watts. The GT 445M requires 3 Watts more than the Radeon HD 7770M to run. The difference is not significant enough for the GT 445M to have a noticeably larger impact on your yearly electricity bills than the Radeon HD 7770M.