In two important trademark cases, Intel (INTC) has settled its suit with Cyrix (CYRX) but has failed to obtain a court order stopping Advanced Micro Devices (AMD) from using "MMX" in its advertising and promotional materials. MMX is a term applied to technology used on Intel, AMD, and Cyrix chips that boosts the performance of certain multimedia applications. Intel claims that it has trademarked MMX and that AMD and Cyrix must attribute the term to the company in advertising and promotional materials. The Cyrix settlement enables the Richardson, Texas-based chip manufacturer "to use MMX with the appropriate attribution," Intel said. This applies not only to Cyrix but also to its customers. But in the other case, Intel suffered a setback Tuesday when a federal judge denied its request for a temporary restraining order against AMD. The ruling means that AMD "may continue to use the term in advertising and promotional materials describing its AMD-K6 MMX processor," the company said in a statement.