In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GT 755M are significantly better than the Nvidia GeForce GT 445M v2.

The GeForce GT 755M has a 410 MHz higher core clock speed and 8 more Texture Mapping Units than the GT 445M. This results in the GeForce GT 755M providing 17.7 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 GeForce GT 755M has a 410 MHz higher core clock speed than the GT 445M and the same number of Render Output Units. This results in the GeForce GT 755M providing 6.6 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 GT 755M was released over a year more recently than the GT 445M, and so the GeForce GT 755M 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 GeForce GT 755M has 1024 MB more video memory than the GT 445M, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the GeForce GT 755M also has superior memory performance overall.

The GeForce GT 755M has 46.4 GB/sec greater memory bandwidth than the GT 445M, which means that the memory performance of the GeForce GT 755M is noticeably better than the GT 445M.

The GeForce GT 445M v2 has 144 Shader Processing Units and the GeForce GT 755M has 384. However, the actual shader performance of the GT 445M is 164 and the actual shader performance of the GeForce GT 755M is 376. The GeForce GT 755M having 212 better shader performance and an altogether better performance when taking into account other relevant data means that the GeForce GT 755M delivers a significantly smoother and more efficient experience when processing graphical data than the GT 445M.

The GeForce GT 755M transistor size technology is 12 nm (nanometers) smaller than the GT 445M. This means that the GeForce GT 755M is expected to run slightly cooler and achieve higher clock frequencies than the GT 445M.

The GeForce GT 445M v2 requires 35 Watts to run and the GeForce GT 755M requires 50 Watts. The GeForce GT 755M requires 15 Watts more than the GT 445M to run. The difference is not significant enough for the GeForce GT 755M to have a noticeably larger impact on your yearly electricity bills than the GT 445M.