Legit Reviews posted a preview on the ATI Radeon HD 4870 X2 Graphics Card
A quote from the article:
>> ATI Radeon HD 4870 X2 Graphics Card Preview
Only four short months ago AMD launched the Radeon HD 3870 X2 graphics card and it was the flagship ATI Radeon product, but the successor has arrived. AMD has taken two of the latest cores (RV770)and placed them on a single PCB to create the Radeon HD 4870 X2 graphics card. AMD kept the clock frequencies the same as the Radeon HD 4870 graphics card, so basically you have the power of a pair of those running CrossFire on a single PCB!
>> ATI Radeon HD 4870 X2 Graphics Card Preview