In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce 2 MX 400 64MB are noticeably better than the Nvidia GeForce 6150 SE 256MB.

The 6150 SE was released over three years more recently than the 2 MX, and so the 6150 SE is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the 2 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 6150 SE has 192 MB more video memory than the 2 MX, so is likely to be slightly better at displaying game textures at higher resolutions. This is supported by the fact that the 6150 SE also has superior memory performance overall.

The 2 MX has 1.3 GB/sec greater memory bandwidth than the 6150 SE, which means that the memory performance of the 2 MX is marginally better than the 6150 SE.

Both the GeForce 6150 SE 256MB and the GeForce 2 MX 400 64MB have 2 Shader Processing Units. While the two GPUs have the same number of SPUs, the actual performance delivered by the 6150 SE is 1 and by the 2 MX is 0. Knowing that the shader performance of the 6150 SE is superior, it is not necessary to examine the GPUs' respective Texture and Pixel Fill Rates.

The GeForce 2 MX 400 64MB requires 4 Watts to run but there is no entry for the 6150 SE.