I added a 128MB video card but still my webcam doesn't work nicely. will adding 512MB DDR266 improve it? TNX!

128mb is on the small side nowadays. I have 512mb and that's a little more excessive. Get a 256mb graphics card. That might do it for you but that's probably not the problem. Your webcam may seem gritty and grainy on your computer because the webcam itself is not very good. Try a newer logitech. The logitech webcams are very good.|||Well you got somewhat ahead of yourself. It is not so much the video card that is the problem. Your webcam needs updated. Buying one that costs over $50 is going to give you a nice quality, not saying the more you pay is better. Try a 1.3megapixel or higher. :)