Upgrading laptop video card?

I'm want to buy a laptop that has a ATI Mobility Radeon HD 4200 video card, and I read that is is shared memory which slows down gaming, so I want to upgrade it but I don't know if the new video card is going to be compatible with the motherboard. Specs:



http://www.tigerdirect.com/applications/searchtools/item-details.asp?EdpNo=5581195&csid=ITD&body=MAIN#detailspecs|||Upgrading laptop video cards is typically impossible. It can usually only been done on systems that were offered in a variety of configurations, and then you can only use those OEM cards that weren't offered to the public, but rather made specifically for the manufacturer of the laptop with custom ROMs, etc. So in other words, you would have to find a complete system and break it down to find that one card that you want.



If the Radeon in your laptop is sharing memory, it means that it has a discreet GPU but no discrete RAM, which implies that there isn't a port connector for an actual video card, but rather a motherboard with these components integrated.



I think you're S.O.L. friend.|||I dont think that you can even upgrade most laptop video cards at all. Most laptops are built so that all of the pieces fit perfectly together so that it can be tightly bundled up giving you the mobility of a laptop. you can upgrade your RAM, but upgrading video cards or anything like that are probably not possible.|||I think it's quite complicated to replace a laptop video card, seeing as all parts except hard drive and sometimes the ram are made to only fit in that certain model of computer. You would only be able to replace it with another factory video card you should just buy a cheap or used gaming laptop, or one with a better card