[AbeSmith]

Darth has some great advice Brownsfan. I would only add that you probably should do some reasearch before building your system. There should be websites about this, and also there may be magazines at Barnes and Nobles that are specifically about building your own system. You might also want to check with a technical support forum, like MajorGeeks for example, and ask them what kind of hardware setup they recommend for your requirements. You might be able to use some of your old parts, like graphic cards, ram, and power supply. Just makes sure your power supply is high wattage to be able to handle multiple cards. Your motherboard's manual should also tell you what amount of power is recommended. Let us know how it progresses.