Being able to have the performance of a HD 4800-series card on demand, with the power-draw of the integrated HD 3200 during idle and media playback would be a far greater boon than receiving around 20 per cent additional performance when pairing the chipset with a HD 3450-based card.
So can you pair the board with a 4850 and have it work in tandem? Is the 790G series going to bring that to the table?
I really like the idea of the Hybrid CrossFire motherboards. I saw the reviews of the 680G's and will definatly use them or more likely the 780G's for any media pc's or simple surfing machines for anyone that wants a new pc.
I'd love either a X3 or X4 BE with a 4850 and the onboard for 2D/movies. Fire up the 4850 for games only. Dump it in a little Shuttle Enclosure with Mirrored Raid for storage and a little SSD for OS/Games.
/me goes back to dreaming of lottery win
(And a Puma Laptop)