AMD announced the immediate availability of the ATI Radeon HD 3870 X2 graphics processor, expanding the visual boundaries of PC entertainment well beyond the 1080P High Definition (HD) threshold. The industry’s first graphics processor to break the Teraflop (one trillion floating point operations per second) barrier, the ATI Radeon HD 3870 X2 nearly doubles the performance of the award-winning ATI Radeon HD 3870 introduced in November 2007. 

The 55 nm process-based ATI Radeon 3870 X2 combines two ATI Radeon HD 3870s on a single graphics board, connected through integrated CrossFire technology. AMD said the ATI Radeon 3870 X2, which supports Microsoft’s upcoming DirectX 10.1 technology, delivers a new class of price and performance leadership with unbelievable enthusiast value at a suggested retail price of $449.  (source)