In terms of overall gaming performance, the graphical capabilities of the AMD Radeon X550 Series are marginally better than the Nvidia GeForce 4 MX 440.

The Radeon X550 Series was released over three years more recently than the 4 MX, and so the Radeon X550 Series 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 Radeon X550 Series 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 Radeon X550 Series also has superior memory performance overall.

The Radeon X550 Series has 4.8 GB/sec greater memory bandwidth than the 4 MX, which means that the memory performance of the Radeon X550 Series is marginally better than the 4 MX.

The GeForce 4 MX 440 has 2 Shader Processing Units and the Radeon X550 Series has 4. The two GPUs are based on different architectures, but deliver an equivalent shader performance. To compare, we must continue to look at the memory bandwidth, Texture and Pixel Rates. In this case, we sadly do not have enough data in this area to complete the comparison.