I just bought a pair of asus 4770's from newegg and of course there was no crossfire bridge in either box. There are 2 crossfire slots on top of each card. Do I need two bridges or one, and if I only need one bridge, should I place it on the left or right slot?! Couldn't find any help on AMD/ATI's web site and as far as ASUS is concerned... it doesn't even exist! Thanks for any help!