FUD Zilla spotted that AMD has rebranded a bunch of Radeon HD 5000 series cards to Radeon HD 6000 series for the Russian market:
Acer Russia told reporters that Russian PC integrators will soon start selling PCs with rebranded HD 5000 series cards in retail, but the move appears to be limited only to entry-level HD 6000 brands and only the Russian market. For now at least.
Russian PC maker K-Systems will offer three rehashed HD 5000 cards in its systems starting November. The cards are apparently branded HD 6250, HD 6390 and HD 6510. At this point we don't know which HD 5000 series cards they are based on, but we're probably looking at Cedar and Redwood cores.
Mind you, the Redwood is still a competitive entry-level part, as it is faster than Nvidia's GF108-based GT430, so the move is understandable.