Hexus.net pictured the RV730 series and RV710 based reference graphics cards that will populate ATI's low-thru-mid range of products under the successful Radeon HD 4000 series. In the picture, the RV730 XT based Radeon HD 4670 is to the left in the foreground. Next to it (right), is the RV 730 Pro. The card in the center (background) is the RV710 that's passively cooled. The specifications of the RV730 cards can be read
here. Little is known about RV710 at this point, except that it comes in two models, using DDR2 or GDDR3 memory and will be branded as Radeon HD 4450 and HD 4470. Here's a picture of a RV710 based card that is passively cooled this model seems to come with a DVI port along with a HDMI and DisplayPort connector.
The full article can be read
here.