In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce 940MX 2GB are massively better than the Nvidia GeForce 8700M GT.

The GeForce 940MX 2GB was released over three years more recently than the GeForce 8700M GT, and so the GeForce 940MX 2GB is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the GeForce 8700M GT when running the latest games.

The GeForce 940MX 2GB has 1536 MB more video memory than the GeForce 8700M GT, so is likely to be much better at displaying game textures at higher resolutions. However, the overall memory performance is about the same.

The GeForce 8700M GT has 9.6 GB/sec greater memory bandwidth than the GeForce 940MX 2GB, which means that the memory performance of the GeForce 8700M GT is marginally better than the GeForce 940MX 2GB.

The GeForce 940MX 2GB has 384 Shader Processing Units and the GeForce 8700M GT has 32. However, the actual shader performance of the GeForce 940MX 2GB is 644 and the actual shader performance of the GeForce 8700M GT is 20. The GeForce 940MX 2GB having 624 better shader performance and an altogether better performance when taking into account other relevant data means that the GeForce 940MX 2GB delivers a noticeably smoother and more efficient experience when processing graphical data than the GeForce 8700M GT.

The GeForce 940MX 2GB transistor size technology is 52 nm (nanometers) smaller than the GeForce 8700M GT. This means that the GeForce 940MX 2GB is expected to run massively cooler and achieve higher clock frequencies than the GeForce 8700M GT.

The GeForce 940MX 2GB requires 25 Watts to run and the GeForce 8700M GT requires 29 Watts. The GeForce 8700M GT requires 4 Watts more than the GeForce 940MX 2GB to run. The difference is not significant enough for the GeForce 8700M GT to have a noticeably larger impact on your yearly electricity bills than the GeForce 940MX 2GB.