a similar basic design that is compatible offered obvious cost and time savings. At the end of the pipeline, the texture addressing processors are decoupled from pixel shaders, so any unused texturing units can be dynamically allocated to pixels that need more texture layers. Other improvements include 4096x4096 texture support and ATI's 3Dc normal map compression saw an improvement in compression ratio for more specific situations. The R5xx family introduced a more advanced onboard motion-video engine. Like the Radeon cards since the R100, the R5xx can offload almost the entire MPEG-1/2 video pipeline. The R5xx can also assist in Microsoft WMV9/VC-1 and MPEG H.264/AVC decoding, by a combination of the 3D/pipeline's shader-units and the motion-video engine. Benchmarks show only a modest decrease in CPU-utilization for VC-1 and H.264 playback. A selection of real-time 3D demonstration programs was released at launch. ATI's development of their "digital superstar", Ruby, continued with a new demo named The Assassin. It showcased a highly complex environment, with high-dynamic-range lighting (HDR) and dynamic soft shadows. Ruby's latest competing program, Cyn, was composed of 120,000 polygons. The cards support dual-link DVI output and HDCP. However, using HDCP requires external ROM to be installed, which were not available for early models of the video cards. RV515, RV530, and RV535 cores include a single and a double DVI link; R520, RV560, RV570, R580, R580+ cores include two double DVI links. AMD released the final Radeon R5xx Acceleration document. Drivers The last AMD Catalyst version that officially supports this series, is 10.2, display driver version 8.702. Variants X1300–X1550 series This series is the budget solution of the X1000 series and is based on the RV515 core. The chips have four texture units, four ROPs, four pixel shaders, and 2 vertex shaders, similar to the older X300 – X600 cards. These chips use one quad of an R520, whereas the faster boards use just more of these quads; for example, the X1800 uses four quads. This modular design allows ATI to build a "top to bottom" line-up using identical technology, saving research, development time, and money. Because of its smaller design, these cards offer lower power demands (30 watts), so they run cooler and can be used in smaller cases. Eventually, ATI created the X1550 and discontinued the X1300. The X1050 was based on the R300 core and was sold as an ultra-low-budget part. Early Mobility Radeon X1300 to X1450 are