I want to install an ATI Radeon Sapphire 9250 128 mb video card. It says my motherboard has to be AGP compliant. Using a program that shows some system info, it says i have an AGP bus. I took off the side panel of my computer, and where the AGP slot should be, theres a blank space, 3(maybe more) holes, and it says AGP slot.... what should i do?