How do these exactly work? So far i know SLI uses a bridge connection to connect 2 cards and Crossfire uses a external wire. Can someone give me deeper detail? Thanks.
afaik crossfire has 3 different modes, 1) both cards draw the same image, its then put together on the master card, or more recently jsut card A then sent to the monitor 2) one card does one frame the other card does the next frame, they alternate frames essentially. 3) the screen is split into lines and one card does the odd lines the other card does the even lines, pretty much the same as the above version really i think sli only does the top one.
I wrote a bunch of stuff about CrossFire/SLI here (two pages on each, discussing pros/cons - it doesn't include the latest iteration of CrossFire though). There are also some embedded links for further reading too.
