In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce 6150 SE 256MB are massively better than the Nvidia Quadro4 980 XGL.

The 6150 SE was released over three years more recently than the Quadro4 980 XGL, 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 Quadro4 980 XGL 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 128 MB more video memory than the Quadro4 980 XGL, so is likely to be slightly better at displaying game textures at higher resolutions. However, the overall memory performance is about the same.

The Quadro4 980 XGL has 5.2 GB/sec greater memory bandwidth than the 6150 SE, which means that the memory performance of the Quadro4 980 XGL is marginally better than the 6150 SE.

The Quadro4 980 XGL 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.