This excerpt taken from the AMD 10-K filed Mar 1, 2007.
Competition in the Graphics and Chipset Market
In the graphics and chipset market, our competitors include discrete graphics suppliers and suppliers of integrated graphics chipsets. A recent trend in the graphics processing market is that PC manufacturers are increasingly choosing to use integrated chipsets, particularly for notebook computers, over discrete GPUs because integrated chipsets cost significantly less than discrete GPUs while offering acceptable graphics performance for most mainstream PC users. Intel manufactures and sells integrated graphics chipsets bundled with their microprocessors and is a dominant competitor in this market. It is possible that Intel could leverage its dominance in the microprocessor market to sell its integrated chipsets, which could shrink the total available market for certain of our discrete GPUs, that Intel could re-enter the discrete GPU market, or that Intel will take other actions that place our discrete GPUs and integrated chipsets at a competitive disadvantage such as designing a proprietary graphics interface.
Other than Intel, our principal competitor is Nvidia Corporation, and to a lesser extent, Matrox Electronic Systems Ltd., Silicon Integrated Systems Corp. and Via Technologies, Inc. Other competitors include a number of smaller companies which may have greater flexibility to address specific market needs. However, we believe that the growing complexity of visual processors and the associated research and development costs represent an increasingly high barrier to entry in this market.