The X was based on the R core and was sold as an ultra-low-budget part. The Radeon X video cards, that included a R, were released with a delay of several months because ATI engineers discovered a bug within the GPU in a very late stage of the development. There is actually a fifth stop, one that is significantly less complex, designed for the PCI Express interface and video input. For example, the X uses 4 “quads”. In addition to ring bus, each memory channel now has the granularity of bits, which improves memory efficiency when performing small memory requests. The Radeon X series using the core was introduced on October 5, , and competed primarily against nVidia’s GeForce series. UVD 7 [18] [d].

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The next major change to the core is with its memory bus. For example, the X uses 4 “quads”.

When one of the shader quads becomes idle, due to a completion of a task or waiting for other data, viideo dispatch engine will assign the quad with another task to do in the meantime, with the overall result being a greater utilization of the shader units, theoretically.

The primary change between R and R is that ATI changed the pixel shader processor to texture processor ratio.

This generation has support for all recent memory types, including GDDR4. At the end of the pipeline, the texture addressing processors are now decoupled from pixel shader, so any unused texturing units can be dynamically allocated to pixels that need more texture layers.


As is typical for an ATI video card release, a selection of real-time 3D demonstration programs were released at launch. Retrieved 7 December Last AMD Catalyst version that officially supports this series, is Radeon R5xx Acceleration v. Because of its smaller design, these cards also offer lower power demands 30 wattsso they run cooler and can be used in smaller cases. UVD 7 [18] vidro. Basically the chip can spread out memory requests faster and more directly to the RAM chips.

See article on R’s pixel shaders. From Wikipedia, the free encyclopedia. This page atti last edited on 8 Mayat Retrieved from ” https: Radeon HD Series.

Radeon X series – Wikipedia

In other projects Wikimedia Commons. Unfortunately, due to the programming content of available games, the X is greatly hampered by lack of texturing power. Around the chip there are two bit ring buses running at the sti speed as the DRAM chips, but in opposite directions to reduce latency.

Ruby’s latest nemesis, Cyn, was composed ofpolygons. The problem had been almost random in how it affected the prototype videi, making it quite difficult to finally vudeo. Like its predecessor X, the R chip carries 4 “quads” 4 pipelines eachwhich means it has similar texturing capability if at the same clock speed as its ancestor, and the NVIDIA series. ATI Technologies products Video cards.


The X series has two parts, which are quite different with regards to performance.

Views Read Edit View history. With chips such as RV and R, where tai number of shader units per pipeline triples, the efficiency of pixel shading drops off slightly because these shaders still have the same level of threading resources as the less endowed RV and R ATI has been working for years on a high-performance shader compiler in their driver for their older hardware, so staying with a similar basic design that atl compatible offered obvious cost and time savings.

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Radeon X1000 series

The chips have 4 16550 units4 ROPs4 pixel shadersand 2 vertex shaderssimilar to the older X – X cards. X was quickly replaced by X because of its delayed release.

Retrieved 23 March This series is the budget solution of the X series and 16500 based on the RV core. Changes necessary for SM3. With such a large number of threads per “quad”, ATI created a very large general purpose register array that is capable of multiple concurrent reads and writes and has a high-bandwidth connection to each shader array.