Radeon HD 5850 on OpenSuse 11.1


yesterday I bought a brand new ATI Radeon HD 5850. I know, there are no drivers available right now. But I thought the vesa driver might work with. For the moment I could live with it. I tried to configure the new graphics adapter with SaX2 -r -m 0=vesa but sax did not start up.
So I tried to change the driver from fglrx to vesa in the xorg.conf (previously I had a Radeon HD 3200 installed) but that did’nt worked either. So I tried to start with the start option x11failsafe. After that sax could start a x server but with a corrupted screen.

Any ideas what i can do now?