Yesterday, hardware.fr published a news report indicating pre-consumer revisions of RV610, with UVD problems, were shipped to OEM customers in the Far East.
The production revision of RV610 is A14, with hardware.fr claiming AMD sold at least 10K pieces of A13 RV610 to Palit and PC Partner. A13 has issues with UVD for video playback acceleration, and hardware.fr wonder that even if AMD can somehow work around the issue in software, will the end result be the same as you'd get with A14 silicon. We imagine not, and we can't track down an A13 RV610 to test.
RV630 might also face the same issue, although it's not clear if AMD released any pre-A15 silicon to OEM customers (A15 is the production revision for RV630). The shipped A13 RV610s won't find their way to retailed box products, and the partners in question mention that China is the destination for the 10K pieces mentioned above.
fr don't speculate if AMD knowingly sold A13 RV610 to partners without telling them of the UVD issues, and we'd be surprised if that were the case.
