Update 2: March 24, 2011, 3:00pm CST -
Intel contacted us and requested a story correction claiming that video was a part of the Celerons. To make sure we were understanding the technical details correctly we asked Intel to answer a list of questions about what is and is not missing from the new Celeron GPUs. These parts are 6EU GPUs with a lot of non-EU circuitry removed as you can see from the die shots currently available.
The question of what exactly is missing was not an easy one to answer, Intel seems to have removed a great deal of technical information from their web site. Intel does not even list the type of HD' graphics, 2000, 3000, or a newer generation, much less state the EU count for their GPUs. See here
Adding to the confusion was Intel listing the vague terms Clear Video Technology and Clear Video HD Technology without providing any definitions nor background information to help us translate the marketing-speak nonsense into something technically understandable. That said, the Celerons didn't have either, the bigger parts did have the HD version, but the non-HD was not listed. HD is presumably a superset of non-HD, but since there is basically zero documentation on this anywhere we can find, it may not be the case.
Not wanting to update the story until we knew what was and was not in the new Celerons, we asked Intel. Basically we requested technical clarity on a long list of questions and asked about every little feature we could think of, and Intel graciously answered them all. With that in mind, we can update a few things about the feature set of the new GPUs.
Intel said that the biggest difference was that the Celerons lack Quicksync', aka hardware assisted video encode. Video decode for H.264, VC-1, and MPEG2 are still fully hardware decoded in the Celeron GPUs. All of the APIs listed as supported, DirectX 10.1, OpenGLx, and the rest are the same as the CoreSomething models too.
The other major difference between the two is post processing, and those are all missing on the Celerons. These include Skin Tone Enhancement, Total Color Control, and Adaptive Contrast Enhancement. This is a curious choice because these should be done in the EUs, not the hardware, and the count of those hasn't changed in the Celeron, nor has the clock moved much. It looks like this is a software/market differentiation thing more than anything else.
There you have it. Sorry for any delays, and thanks to the guys at Intel for taking the time to answer our long and somewhat noxious list of questions.S|A