month we got word that AMD might rebrand some if its entry level and mainstream HD 5000 series products in select markets.
Although AMD did not comment the reports, it appears that some cards will indeed be rebranded. According to Geeks3D, the HD 5550 has become the HD 6390, courtesy of a new BIOS.
In addition, AMD is expected to rebrand a couple more cards based on Redwood and Cedar cores, but we still don't know the specifics.
You can check out the photos here