The major physical configuration issue when getting a video card is what slot types you can use in your system's motherboard. Each slot type is commonly referred to by its acronym.
Two types of slots, and thus two types of video cards, are available:
PCI (Peripheral Component Interconnect) ?A slot designed to accommodate a wide range of computer parts, including video cards, sound cards, and modems. Your computer will contain up to six PCI slots.
AGP (Accelerated Graphics Port) ?Developed more recently, the AGP slot (there is only one on a motherboard) is dedicated solely to video cards. As such, AGP video cards are more powerful than PCI cards.
To use an AGP graphics card, you need to have a compatible AGP slot on your motherboard. You can check with your computer?s manufacturer (or your motherboard?s manufacturer) to determine if you have an AGP slot or not.
if yes then go for the AGP rather than PCI, if not , then only go for PCI or express ones cause u don't have other option.
And also make sure its exactly 1.5 v or it might damage the computer permanently.