[Force Flow]

It appears that not all thermal compounds advertising that they contain silver, actually contain no silver.

The testing solution stayed orange - if it had any silver in it, the acids would turn varying degrees of red, depending on the purity of the silver present. OCZ claims that OCZ Ultra II Premium Silver compound is, "Made with 99.9% pure micronized silver, Over 70% silver content by weight". I cannot concur and my tests conclusively show that there is Zero micronized silver present, and Zero silver content by weight.

http://www.overclockers.com/articles938/