In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce 6150 SE 256MB are marginally better than the Nvidia GeForce 6100 nForce 405.

The 6150 SE was released less than a year after the 6100 nForce, and so they are likely to have similar driver support for optimizing performance 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 256 MB video memory, but the 6100 nForce does not have an entry, so the two GPUs cannot be reliably compared in this area.

Both the GeForce 6100 nForce 405 and the GeForce 6150 SE 256MB have 2 Shader Processing Units. 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.