9800GT are too, but I think Asus is about the only manufacture that puts dual bridge connectors on them.
I thought I read somewhere that the asus card while have 2 connectors only support regular SLI, I could be wrong ,, I thought that maybe Asus was anticipateing a driver from nvidia to allow other cards to support tri- SLi
Nvidias website only has the cards I mentioned on it for 3 way sli
But ive been wrong before.. lol