Chrome 20 Series
is the successor of S3 Graphics GammaChrome S18
Chrome 20 series was launched on 2005-11-3, with Chrome S25 and Chrome S27 as the initial products. Both cores use Fujitsu's 90 nm process. Similar to the GammaChrome S18, it is designed for PCI Express
, and marketed to low to mid end of the graphics card market, with Chromotion 3 Video Engine and low power consumption as main selling points.
Memory interface supports 32, 64, or 128-bit of GDDR1, GDDR2 or GDDR3 memory. Chrome 20 series can use 32-256MiB GDDR1 or GDDR3 memory at maximum 700 MHz, or 64-512MiB GDDR2 memory at maximum 500 MHz.
Similar to Radeon X1000
series, texturing units and raster operators are separated from pixel shaders. Chrome 20 has 4 vertex shaders, 8 pixel shaders, 4 texturing units, 4 raster operators.
Display output now integrates a single-link TMDS transmitter, with support of dual-link using external transmitters.
Other new features include MultiChrome and AcceleRAM.
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This revision of Chromotion Engine adds support of nonlinear video scaling, commonly used by wide screen television sets. TV encoder now supports 18 DTV ATSC formats
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feature, debuted in Chrome S20 series, allows 2 or more cards to be used together to increase performance, even though configurations of more than 2 cards have not been tested. The methods used by... Read More