In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 280M are marginally better than the Nvidia GeForce 920M 2GB.

The GeForce GTX 280M has a 10 MHz higher core clock speed and 32 more Texture Mapping Units than the GeForce 920M 2GB. This results in the GeForce GTX 280M providing 19 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 GTX 280M has a 10 MHz higher core clock speed and 8 more Render Output Units than the GeForce 920M 2GB. This results in the GeForce GTX 280M providing 4.8 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 920M 2GB was released over three years more recently than the GeForce GTX 280M, and so the GeForce 920M 2GB is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the GeForce GTX 280M when running the latest games.

The GeForce 920M 2GB has 1024 MB more video memory than the GeForce GTX 280M, so is likely to be much better at displaying game textures at higher resolutions. However, overall, the GeForce GTX 280M has superior memory performance.

The GeForce GTX 280M has 46.4 GB/sec greater memory bandwidth than the GeForce 920M 2GB, which means that the memory performance of the GeForce GTX 280M is noticeably better than the GeForce 920M 2GB.

The GeForce 920M 2GB has 384 Shader Processing Units and the GeForce GTX 280M has 128. However, the actual shader performance of the GeForce 920M 2GB is 366 and the actual shader performance of the GeForce GTX 280M is 187. The GeForce 920M 2GB having 179 better shader performance is not particularly notable, as altogether the GeForce GTX 280M performs better when taking into account other relevant data.

The GeForce 920M 2GB transistor size technology is 27 nm (nanometers) smaller than the GeForce GTX 280M. This means that the GeForce 920M 2GB is expected to run slightly cooler and achieve higher clock frequencies than the GeForce GTX 280M. While they exhibit similar graphical performance, the GeForce 920M 2GB should consume less power than the GeForce GTX 280M.

The GeForce 920M 2GB requires 25 Watts to run and the GeForce GTX 280M requires 75 Watts. The GeForce GTX 280M requires 50 Watts more than the GeForce 920M 2GB to run. The difference is significant enough that the GeForce GTX 280M may have a slight adverse affect on your yearly electricity bills in comparison to the GeForce 920M 2GB.