I believe I ought to take a moment to explain how we came to believe the Radeon HD 2900 XT had full HD video playback acceleration, an impression formed by many layers of talk from AMD, starting with the Radeon HD name. Let me share a slide with you from a presentation titled "ATI Radeon HD 2000 Series and the Ultimate HD Experience," given by AMD's David Cummings, Director of Mobile GPU Marketing. The slide looks like so:
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You can, of course, read for yourself that it says "Avivo HD technology makes full spec HD DVD / Blu-Ray (HD Disc) playback accessible at all price points," but I just like repeating it. That gives one a certain idea, does it not? Now, let's have a look at another slide showing what Avivo HD brings to video decode acceleration:
[PICTURE]
The bit labeled "Avivo HD" shows GPU acceleration of bitstream processing and entropy decode, and makes clear it's distinct from the Radeon X1000's Avivo video processing, which lacks acceleration of those stages.
Now, look at any specs list for the Radeon HD 2900 XT?say, this one from AMD's website, and you will find listed among its specs "ATI Avivo? HD Video and Display Platform" and a bullet point under that saying "HD decode acceleration for H.264/AVC, VC-1, DivX and MPEG-2 video formats." At the end of the day, one gets the impression that this GPU has Avivo HD, with all that entails.
Of course, AMD has left itself some wiggle room in its technical statements. The specs list above isn't technically untrue?just imprecise. The dodge built into the Cummings presentation, with its talk of making HD video playback "accessible at all price points" seems to be that high-end CPUs can handle HD video playback without as much assistance from the GPU. But that's a paper thin excuse, in my view.
To make sure this wasn't simply a matter of me missing the boat?it has been known to happen, and I've got a few gray hairs promising more of the same in the future?I checked with a couple of other journalists who attended a separate Radeon HD press event the week after the one I attended. Both Marco Chiappetta from HotHardware and Ryan Shrout of PC Perspective came away from their meetings with AMD convinced the Radeon HD 2900 XT had full HD playback acceleration via UVD logic, as well. I was not alone in gathering this impression from AMD. To their credit, some reviewers did sort through the fog and identify the Radeon HD 2900 XT's lack of UVD, but they were swimming against the tide of statements from AMD itself.
Nor could any of us have uncovered this fact prior to the publication of our reviews via testing, because AMD hasn't yet delivered a driver that includes the support for the Radeon HD's "full" multimedia capabilities. They initially targeted May 9 for that driver's release. AMD now says the driver is due next week.