Techpowerup found photos of XFX's Radeon HD 4850 and Radeon HD 4870 graphics cards.
Some surprises: Both use black coloured PCB, neither are 100% reference ATI design, and in fact, XFX designed its own cooler for the Radeon HD 4850 512 MB (model: XFX HD485X-YDFC). The Radeon HD 4870 in the picture is the 1 GB variant (model: HD487A-ZDFC). Both accelerators use AMD reference clock speeds. These cards will be released within the first two weeks of this month.