In terms of overall gaming performance, the graphical capabilities of the Intel HD Pentium G630T are massively better than the Nvidia GeForce 4 MX 440.

The HD Pentium G630T was released over three years more recently than the 4 MX, and so the HD Pentium G630T 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 4 MX has 128 MB video memory, but the HD Pentium G630T does not have an entry, so the two GPUs cannot be reliably compared in this area.

The HD Pentium G630T has 6 Shader Processing Units and the GeForce 4 MX 440 has 2. However, the actual shader performance of the HD Pentium G630T is 12 and the actual shader performance of the 4 MX is 1. The HD Pentium G630T having 11 better shader performance and an altogether better performance when taking into account other relevant data means that the HD Pentium G630T delivers a marginally smoother and more efficient experience when processing graphical data than the 4 MX.