In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce 6150 LE are significantly better than the AMD Radeon X1200 128mb.

The Radeon X1200 128mb was released over a year more recently than the GeForce 6150 LE, and so the Radeon X1200 128mb is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the GeForce 6150 LE.

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 Radeon X1200 128mb has 128 MB video memory, but the GeForce 6150 LE does not have an entry, so the two GPUs cannot be reliably compared in this area.

The GeForce 6150 LE has 2 Shader Processing Units and the Radeon X1200 128mb has 4. 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.