We just posted our first results of a CrossFire made with X1800GTO boards and an XPress 3200 mobo from Sapphire.
Results are quite interesting and we see that Xfire can be as powerful as SLi when GPUs are heavy loaded. But when they're not, SLi is more powerfull than ATI's solution.
http://translate.google.com/transla...&hl=fr&ie=UTF-8&oe=UTF-8&prev=/language_tools
Its translated so bear with me
Original in French : http://www.pcinpact.com/actu/news/28670-Radeon-X1800GTO-deblocage-et-CrossFire.htm