Benchmark results of AMD upcoming R680 is leaked on the net. Picture of the reference card is also shown at ITOCP website from China. From the photo, we can see 2 GPU cores and it also requires to sets of power connectors. The centre is a PLX chipset, which channels data between the two GPUs.
The GPU Core / Mem of this card is rated at 770/2250. In current Catalyst driver, it is recognised as HD3870. In CCC, it shows that it is operating at PCIE 2.0 x 8. It has a memory of 1GB.
In 3DMARK06 at 2560X1600 , benchmark scored 9573 ((SM2.0: 4494, SM3.0/HDR:4476). Lower resolution benchmark numbers are not mentioned in the original article.
Source : http://www.ocworkbench.com/news/chinese.php