With considerably more power at its disposal, the HD 2900 XT handles these jobs in its shader core instead. These lower-end Radeon HDs also feature hardware acceleration of deinterlacing, vertical and horizontal scaling, and color correction. UVD handles key portions of the decoding process for high-definition codecs like H.264 and VC-1, lowering the CPU usage during playback of HD DVD and Blu-ray movies. The most prominent of them is dubbed UVD, for universal video decoder. The new video playback features are touted as Avivo HD. As these are DirectX 10-compliant GPUs, these mid-range parts can perform a number of new tricks not present in the X1300/1600 series, including streaming data out of the shader core, which enables the geometry shader capability required in DX10 specifications.īeyond the 3D graphics stuff, these new GPUs pack in some HD video playback capabilities that are not present in HD 2900 XT. Each of the five ALUs in this superscalar unit can execute a separate instruction, leading AMD to count them as five “stream processors.” This makes RV610 and RV630 more efficient than the outgoing Radeon X1300 and X1650 cards. AMD’s new five-wide execution unit is the basic building block of this shader engine. The RV610 and RV630 share the R600’s unified shader architecture, which dynamically deploys on-chip computational resources to address the most pressing graphics problem at hand, whether it be for pixel shading or vertex processing and manipulation. The two new chips with we’re looking at today are based on the R600, using the same internal logic but scaled back with less internal parallelism to make them smaller and less expensive cheaper cores. We first reviewed the R600 at launch back in May as the Radeon HD 2900 XT and covered the basics of AMDs DX10 technology then.
AMD’s family of new DirectX 10 graphics cards is comprised of three new SKUs, the R600, RV630, and RV610.
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