This news seems to be a hot topic over the web and many websites have relayed it telling that Sapphire is rebranding HD 5550 to HD 6390. I wish to clarify this point: I never wrote that Sapphire is rebranding HD 5550. I received the pictures of a Sapphire HD 5550 detected as a HD 6390 by GPU Caps Viewer 1.9.4. That's all. What's more, here is the official position of the Sapphire Russian team (http://www.sapphiretech.ru):
It is standard practice in the industry to have special products that vary from the products on offer in retail for system integration to meet those needs. But Sapphire has not sold any product into the Russian market for the current generation products (i.e. any 5K series rebranded to 6K series). Sapphire take their quality and the care of their products and very seriously. Our own investigation shows that there are no Sapphire products in current K-Systems computers, neither rebranded nor regular. Russian AMD representative and K-System
representative confirmed this.