In terms of overall gaming performance, the graphical capabilities of the Nvidia Quadro K3100M are significantly better than the Nvidia GeForce 920M 2GB.

The Quadro K3100M has a 131 MHz higher core clock speed and 32 more Texture Mapping Units than the GeForce 920M 2GB. This results in the Quadro K3100M providing 26.8 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 Quadro K3100M has a 131 MHz higher core clock speed and 24 more Render Output Units than the GeForce 920M 2GB. This results in the Quadro K3100M providing 18 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 a year more recently than the Quadro K3100M, and so the GeForce 920M 2GB is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the Quadro K3100M.

The Quadro K3100M has 2048 MB more video memory than the GeForce 920M 2GB, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the Quadro K3100M also has superior memory performance overall.

The Quadro K3100M has 88 GB/sec greater memory bandwidth than the GeForce 920M 2GB, which means that the memory performance of the Quadro K3100M is much better than the GeForce 920M 2GB.

The GeForce 920M 2GB has 384 Shader Processing Units and the Quadro K3100M has 768. However, the actual shader performance of the GeForce 920M 2GB is 366 and the actual shader performance of the Quadro K3100M is 542. The Quadro K3100M having 176 better shader performance and an altogether better performance when taking into account other relevant data means that the Quadro K3100M delivers a massively smoother and more efficient experience when processing graphical data than the GeForce 920M 2GB.

The GeForce 920M 2GB requires 25 Watts to run and the Quadro K3100M requires 75 Watts. The Quadro K3100M requires 50 Watts more than the GeForce 920M 2GB to run. The difference is significant enough that the Quadro K3100M may have a slight adverse affect on your yearly electricity bills in comparison to the GeForce 920M 2GB.