Also you need to check if the laptop motherboard will also get updates, drivers, BIOS updates, etc. Since they have mentioned that it will not be upgraded, I am really sorry for the inconvenience caused. For this reason, I would request you to contact your laptop manufacturer to get the compatible driver for your laptop graphics card. The desktop Forceware chipset drivers, which are available on our web site, may not work on your notebook. NVIDIA has worked with some notebook manufacturers to provide notebook-specific driver updates, however, most notebook driver updates must come from the notebook manufacturer. The reason why I am asking you to contact your laptop manufacturer is because Notebook GPUs use drivers that have been customized by the notebook manufacturers to support hot key functions, power management functions, and other hot plug n play feature of the notebook. If not, I really apologize as you will need to contact Dell, as only they will be developing drivers for this laptop graphics solution to work well on their laptop configuration. The drivers available on our website should work with your laptop. For those laptops, the manufacturers develop the drivers specific for them. It works well with most laptops, except for the ones from Sony Vaio, Fujitsu, etc. 'The graphics drivers for the GeForce 330M are developed as per the standard reference design of the chipset as made by us.

I have contacted NVIDIA and just have received a following response from their Customer Support :

Nvidia geforce gt 330m driver update