I am replacing the motherboard and video card in my Alienware Area-51m 7700. I have the new MB but am a little confused over the video card. My question is, Whats the difference between a daughter card: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWAX:IT&item=330340552777 and a parent card?: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWAX:IT&item=330341375858 The only difference I know of between these two cards is on the top side one has a red box with a "D" on it and the other one has a "P" on it. I am hoping to put one of them into a Clevo D900t v 6.2 motherboard. Thanks for your input.