In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce 6150 SE 256MB are noticeably better than the Nvidia Riva TNT2 Pro.

The 6150 SE was released over three years more recently than the Riva TNT2 Pro, 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 Riva TNT2 Pro 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 224 MB more video memory than the Riva TNT2 Pro, so is likely to be slightly better at displaying game textures at higher resolutions. However, the overall memory performance is about the same.

The Riva TNT2 Pro has 2.7 GB/sec greater memory bandwidth than the 6150 SE, which means that the memory performance of the Riva TNT2 Pro is marginally better than the 6150 SE.

Both the Riva TNT2 Pro and the GeForce 6150 SE 256MB 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 Riva TNT2 Pro is 1. 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.