Arctic Silver 5 High-Density Polysynthetic Silver Thermal Compound, 12 grams Large Tube. This 12-gram tube contains enough compound to cover at least 50 small CPU cores, or 20 large CPU cores, or 7 to 15 heat plates. With its unique high-density filling of micronized silver and enhanced thermally conductive ceramic particles is optimized for use between modern high-power CPUs and high performance heatsinks or water-cooling solutions.