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The original R400 project was supposedly canned due to fear of not competing with the NV40.
R420 should be near the silicon stage, if not already in silicon. The core will enter mass produce this quarter. According to my info, it should be a TSMC 130nm low-k based 160M transistor graphics acceletor supporting AGP8X and GDDR3 memory.
R423 will debut shortly after R420 (3-6 months) with support for the PCI Express architecture. Core revisions are rumored, though I have no concrete information at this time.
Robert Richmond
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