Intel's new processor core which features their SSE instructions. Despite the name, the core is not made with copper interconnects. All Coppermine cores are made using 0.18 micron fabrication, and have a 256-bit wide full speed L2 cache, and use Intel's SSE instructions. Pentium 3 Coppermines have 256KB of L2 cache and Celeron FCPGA chips use 128KB.