Radeon HD 2950XT will be the top of ATI's offer Q4 but the next quarter ATI plans to introduce its dual chip card simply called Radeon HD 2950X2X.
The new card will have two RV670 chips on a single PCB and the new solution is codenamed R670. This card will have two times 320 shader units and two times 512MB GDDR4 memory again with 256 bit.
It looks like an interesting card and especially if ATI makes the quad driver works. Don't get carried away as this comes in 2008 and definitely not for Xmas this year.