PowerColor PCS+ HD 7870 MYST Edition (Tahiti LE) 2GB Review @ RWLabs
 

The AMD Tahiti LE graphics processor is the latest iteration in the Southern Islands family and it’s unique in both the implementation and design. This is due to graphics cards based on the new GPU being what is best described as a hybrid between the Tahiti and Pitcairn architecture.

http://www.rwlabs.com/article.php?id=760