When looking at video cards to buy, some say AGP 8x, some say AGP 4x and others say AGP 8x/4x. Whats the difference and how do i tell if my AGP slot has 8x or 4x. Also, when i look at the side, it says needs an "AGP 2.0/3.0 compliant spot". what does that mean? Im a little confused, can anyone help me a little?