I recently installed a 64MB AGP video card and would recommend this simple upgrade to many onwers of newer "old" computers. 

The S video connection allows for output to a larger TV

This card has support for 3D games (you do not know what you are missing!)

The 64MB memory was double what my 2 year old PC had

Installing the card was simple (upgrading your memory, video card, and hard drive can re-vive your PC if it is in a mid-life crisis).