In terms of overall gaming performance, the graphical capabilities of the Nvidia Quadro4 900 XGL are very slightly better than the Intel Q43 Express Chipset.

The Q43 Express Chipset was released over three years more recently than the Quadro4 900 XGL, and so the Q43 Express Chipset is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the Quadro4 900 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 Quadro4 900 XGL has 128 MB video memory, but the Q43 Express Chipset does not have an entry, so the two GPUs cannot be reliably compared in this area.

The Quadro4 900 XGL has 4 Shader Processing Units but the Q43 Express Chipset does not have an entry, so the two GPUs cannot be reliably compared in this area.