In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce 3 are massively better than the Nvidia GeForce 6150 SE 256MB.

The 6150 SE was released over three years more recently than the GeForce 3, 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 GeForce 3 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 GeForce 3, so is likely to be slightly better at displaying game textures at higher resolutions. However, the overall memory performance is about the same.

The GeForce 3 has 3.7 GB/sec greater memory bandwidth than the 6150 SE, which means that the memory performance of the GeForce 3 is marginally better than the 6150 SE.

The GeForce 3 has 4 Shader Processing Units and the GeForce 6150 SE 256MB has 2. 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.