In terms of overall gaming performance, the graphical capabilities of the Nvidia Quadro FX 2000 are massively better than the Nvidia GeForce 6150 LE.

The GeForce 6150 LE was released over a year more recently than the FX 2000, and so the GeForce 6150 LE is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the FX 2000.

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 FX 2000 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 Quadro FX 2000 has 4. However, the actual shader performance of the GeForce 6150 LE is 1 and the actual shader performance of the FX 2000 is 2. The FX 2000 having 1 better shader performance and an altogether better performance when taking into account other relevant data means that the FX 2000 delivers a marginally smoother and more efficient experience when processing graphical data than the GeForce 6150 LE.