A reviewer over at Overclockers.com decided to test four silver thermal pastes. The test is not about the thermal results of these pastes, it is to see if they actually contain Silver.
I decided to test Arctic Silver 5, Arctic Silver 3, OCZ Ultra II Premium Silver Compound, and CompUSA Silver Thermal Grease. This test was not conducted to test performance, but rather to determine if these compounds have Silver as an ingredient.
All Testing was done twice, once on a jeweler's acid free 'Black stone', and the test was repeated on paper. The testing solution was Nitric acid and Muriatic acid that was pre-mixed professionally.
The results of the test are surprising, according to Overclockers.com both the silver compound from OCZ and CompUSA did not contain any silver. OCZ claims on their website that OCZ Ultra II Premium Silver compound is : "Made with 99.9% pure micronized silver, Over 70% silver content by weight".