Some reports popped up that the Radeon HD 4850 works in CrossFire with a Radeon HD 3870 graphics card:
One of our readers has found an interesting post on the Forumdeluxx.de website which shows two ATI Radeon HD 4850 cards paired up with a Radeon HD 3870 DDR4 card in CrossFireX.
Even the user that wrote the post, didn't expect it to work, but it apparently it does and without any problem. The mentioned trio in CrossFireX scores 14,180 marks in 3DMark06. Before sticking in the HD 3870 card, the system scored 12,300 marks under Windows Vista 64-bit.
It is a nice boost when you consider that we are probably talking about the first tests of this kind, and we are sure that the red team will do some more optimizations before the HD 4850 hits the store shelves.