"AMD has been quietly producing test chips using a new, pure version of silicon with greatly enhanced thermal properties....California-based Isonics produces an isotopically pure silicon which has much better thermal conductivity than natural silicon, meaning that heat can be removed more effectively. Isonics won't confirm it's working with AMD, stating only that 'a major microprocessor manufacturer has modeled isotopically pure silicon wafers and has told us that the peak temperature of their advanced 1GHz microprocessor was reduced by 35 degrees celsius.'"