You should be concerned on what your computer is rather than the card you currently have. You didn't give us info on your PC...re the stuff in 'RED' when you went to post here...."Note: If you're asking for technical help......."
An AGP 8x card will work in a AGP 4x computer, and will run at 4x speed.
An AGP 4x card will work in a AGP 1x computer and will run at 1x speed.
I have a 4x AGP computer with 8x AGP card, and a 1x AGP Computer with a 4x AGP card.
Ok, so I'm thinking about changing my graphics card. Right now I have a nVIDIA GeForce4 MX 440 card. On the card's properties window, it says "Bus: AGP 4X". The card I want to upgrade/downgrade (I'm not really sure if this card is better, all I know is that it has more memory) to is a nVIDIA GeForce MX 4000 (http://www.bestbuy.com/site/olspage.jsp?skuId=7215621&type=product&productCategoryId=cat01151&id=1114638478961). The card says that it supports AGP 8X.
so basically im asking: 1) is the MX 4000 card better than the one i have now? and
2) will my computer support the AGP 8X card when my current card says its on a AGP 4X bus?