I'm looking for a sound card for my creative T7900 7.1 speaker set. I guess one limiting factor is that my Dell Dimension 8300 (2003) only excepts PCI cards and not PCI express cards or others. I'm also very confused because the T7900 cable colors do not match any of the sound card color slots I've looked at. These cables have the following colors: gray, green, black, and orange. They connect the subwoofer to the sound card. I would really appreciate some help.