I purchased a new PC and HD monitor. Ive only ever used vga/super vga connectors with video cards and monitors before. Now im in new territory. This new 4870 card only has DVI and HDMI slots on it. What is the difference between each cable? I noticed a large price difference when i looked at my local store. My real question is what is the difference in PERFOMANCE? Thanks for any help in advance. Also, if you can point me to any links to do the research myself, that will be fine. Thank you.