The video card series radeon HD 2600 (RV630) and Radeon HD 2400 (RV610) possess support to the UVD function , which allow to accelerate at the hardware level h.264 and VC-1 decoding , ensuring a comfortable video play from Blu-ray and HD DVD disk using weak computers. But if the video card do not support this acceleration, entire load in the decoding task lies on the central processor, whose resources can be used completely intensively.
As explained associates , not all video card series radeon HD 2400 were capable originally to support UVD. Problems there must not be with video cards, based on revision a14 chip RV610. Specifically, this revision of video chip were used for the production of series graphic card.
However, the revision a13 chip RV610 do note have original support for the UVD function . As declares AMD, for the start UVD on these chips will be couped with special driver version . The most interesting, that a party of 10 000 chips RV610 pre-series revision a13 was sold to palit and Sapphire companies , and those will begin to extend video card on their basis along OEM- channels. Sapphire promises, that all video card on the chips a13 revisions will be sold on Chinese OEM- market. Although AMD indicates that the problem is solved by drivers update.
P.S. Lately sapphire representatives reported to us , the revision a14 chip RV630 support UVD, just as the revision a15. Thus, problem concerns only the revision a13 of video chip RV610, on base of which are made video card series radeon HD 2400.