techPowerUp posted a review on the HIS Radeon HD 3870 X2 1 GB
A quote from the article:
HIS Radeon HD 3870 X2 1 GB Review
The HIS Radeon 3870 X2 combines the power of two ATI RV670 GPUs into one to reach for the performance throne in single card processing power. Even tough the implementation has some minor limitations the overall product is certainly interesting and can maybe bring AMD back in the game.
HIS Radeon HD 3870 X2 1 GB Review