Introducing Arctic Silver 5 With its unique high-density filling of micronized silver and enhanced thermally conductive ceramic particles, Arctic Silver 5 provides a new level of performance and stability. Now available at Arctic Silver dealers worldwide, Arctic Silver 5 is definitely The New Reference. Arctic Silver 5 is optimized for use between modern high-power CPUs and high performance heatsinks or water-cooling solutions. Arctic Silver 5 uses three unique shapes and sizes of 99.9% pure silver particles to maximize particle-to-particle contact area and thermal transfer.