Hi. Does anybody know the diffrence between the diffrent Bt chips? The most common seems to be the BT848 but all the new cards use the BT878 or BT878a. I am thinking of buying either the Pinnacle PCTV rave or the Hauppauge Impact VCB. The PCTV rave use the BT878 in the newer models and the Impact use the BT878a, both cards have a S-video input but the Impact does not have a tuner. I will only use the card for its s-video or composite inputs, i will not use the tuner functions on the PCTV card. What card do you recomend? Both cards have the same price here in Sweden. I will be using Dscaler on a duron 1 ghz, WinXP with 256mb and a 60 gb IBM harddrive. And display it on a Sony VPL CX1.