>There is a socket next to my graphics card (AGP 12V) do I plug my power supply into this?
That is power-in for an AGP Pro graphics card. Do you have an AGP Pro card? There is more than one flavor of Hercules 3d prophet graphics cards and I havenít time to look all of them up. I doubt that you have a Pro card. They are very expensive. See http://www.supermicro.com/TECHSUPPORT/FAQs/AGP_Pro.htm.
>My system is DDR my graphics card is not, is that a problem?
No. The kind of memory used on a graphics card is not related to the kind used on the motherboard.
Do you have another graphics card you can try? Larry