Who would buy AMD?
The best for shareholders would be for Nvidia to buy AMD, thereby removing discrete 3D competition. It would also reduce the HPC threat to Nvidia in GPGPU. Even older Llano APUs are already being used in HPC clusters; if the next generation continues to sell even more into HPC, Nvidia's Tesla and Quadro could be under threat. Furthermore, combined, AMD-Nvidia can produce ARM as well x86 Server offerings. The only drawback is the x86 license between AMD and Intel. It could be the case that AMD would have to redesign parts of its CPUs to make license of Intel patents unnecessary. It is possible, since Via, after legal trouble, still makes x86 compatible parts in the form of Nano. Another possibility could be an Intel takeover. If Intel sees value in GPGPU, they could do worse than buying AMD, especially now that it is cheaper and has already done the hard work of integrating the top ATI GPU into the CPU. After all, it could be a defensive move to prevent ARM server entrants snapping up AMD. Lastly, AMD could break up. For instance, selling ATI to Qualcomm (QCOM) and licensing back GPU tech for its APUs.