This is a link to Mike Parker's site on The Clarity Series MP-1 Video Card Modification. This modification is pretty popular among those building a high end home theater PC (HTPC). The MP-1 mod is a high bandwidth RGB true 75 ohm line driver and filter circuit designed to work with ATI’s 7500, 8500, 9000, 9500 and 9700 video cards.
Wisdom Technologies Products - Video Card Modification