Vikingod

Let's get this out of the way first. ATI's first multi-GPU product implementation (dubbed Crossfire) which was seen on the Radeon X850 product lineup, simply wasn't very good. At the time of its inception, ATI’s Radeon X850 graphics cards were already nearing the end of their lifespan as a top tier product (lacking features such as Shader Model 3.0 and HDR support), and the Radeon X850 architecture simply was not designed with multi-GPU operation in mind. ATI's method of linking two of these high-end cards together was seemingly tacked on in order to have a competing product to nVidia's SLI, rather than a full-fledged, from the ground-up, multi-GPU solution. While the solution did perform well (an admirable feat from ATI's engineers, who had to develop this solution after the fact), the solution has resolution limitations, required rare motherboards, and simply had a lot of rough edges. While some early ATI fans got onboard, the solution generally did not pan out as ATI intended.
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Read More / Source: GamePC

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