In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce FX 5700 are very slightly better than the Nvidia GeForce 4 MX 440.

The GeForce FX 5700 was released over a year more recently than the 4 MX, and so the GeForce FX 5700 is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the 4 MX.

Both GPUs exhibit very poor performance, so rather than upgrading from one to the other you should consider looking at more powerful GPUs. Neither of these will be able to run the latest games in any playable way.

The GeForce FX 5700 has 128 MB more video memory than the 4 MX, so is likely to be slightly better at displaying game textures at higher resolutions. This is supported by the fact that the GeForce FX 5700 also has superior memory performance overall.

The GeForce FX 5700 has 0.8 GB/sec greater memory bandwidth than the 4 MX, which means that the memory performance of the GeForce FX 5700 is marginally better than the 4 MX.

The GeForce FX 5700 has 4 Shader Processing Units and the GeForce 4 MX 440 has 2. However, the actual shader performance of the GeForce FX 5700 is 2 and the actual shader performance of the 4 MX is 1. The GeForce FX 5700 having 1 better shader performance and an altogether better performance when taking into account other relevant data means that the GeForce FX 5700 delivers a marginally smoother and more efficient experience when processing graphical data than the 4 MX.