All the partners' HD 4850 cards we've seen hit shelves thus far tend to be much of the reference design, but PowerColor have taken a huge step away from the same ole' approach by whacking on 2GB of GDDR3 memory. This is a huge leap from the usual 512MB, and although probably overkill, it should certainly help the card under higher resolutions where the memory buffer is more likely to be filled.
Further to that, PowerColor has also cranked up the memory frequency to 2000MHz and the core to 665MHz out of the box. The icing on the cake is the inclusion of a superior full-copper cooling solution from ZEROTherm.
Pricing and availability hasn't yet been disclosed, but thanks to Expreview for the pics and info on the card.