Like the Radeon X800 GT/X800 GTO, ATI’s Radeon X1800 GTO starts life out as a high-end GPU that’s been adapted for use in the mainstream market. In the case of the X1800 GTO, ATI relies on the exact same R520 GPU that was used previously in Radeon X1800 XT/X1800 XL graphics cards, only they’ve disabled a few of the GPU’s features in order to serve the mainstream market.

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