In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 2400 XT are significantly better than the Nvidia GeForce 4 MX 440.

The HD 2400 XT was released over three years more recently than the 4 MX, and so the HD 2400 XT is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the 4 MX when running the latest games.

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 HD 2400 XT 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 HD 2400 XT also has superior memory performance overall.

The HD 2400 XT has 4.8 GB/sec greater memory bandwidth than the 4 MX, which means that the memory performance of the HD 2400 XT is marginally better than the 4 MX.

The Radeon HD 2400 XT has 40 Shader Processing Units and the GeForce 4 MX 440 has 2. However, the actual shader performance of the HD 2400 XT is 26 and the actual shader performance of the 4 MX is 1. The HD 2400 XT having 25 better shader performance and an altogether better performance when taking into account other relevant data means that the HD 2400 XT delivers a marginally smoother and more efficient experience when processing graphical data than the 4 MX.

The Radeon HD 2400 XT requires 25 Watts to run but there is no entry for the GeForce 4 MX 440.