Welcome to the forum,
(I can honestly say I've not heard of anyone replacing an integrated video chip*)
Some PCs have an integrated video chip. That is, the video chip is built into the PC's motherboard, as opposed to a chip built into a video card that is installed in a PCI (Peripheral Component Interconnect) slot or AGP (Accelerated Graphics Port) slot on the PC's motherboard. A video chip (sometimes called a GPU [graphics processing unit]) is like an extra CPU built into a video card that is dedicated to processing video data. The advantage of an integrated video chip is that it lowers the cost of the system. The disadvantage is the quality of an integrated video chip is typically not as good as that of a video card with a chip built into it. Also, integrated video chips have to share system memory with the PC's CPU. This can hurt your system's performance, especially when you are running a graphics-intensive application.
I'm pretty sure you'd be better off just getting another mobo or a video card if you have a PCI- / AGP slot/ port available - ... (PCI-E) is the best situation....
Why don't you post what you have for a system and we
can start from from there first.....................