Shin-Etsu is the best thermal paste I've ever used. It withstands low temperatures and lasts a very long time. This is an industrial silicone paste made in Japan, and whether you're using air or water cooling, expect excellent performance. Don't waste your time with other "popular" brands. is what you want Take a look at the comparative studies and see for yourself: Shin-Etsu performs best when it comes to booting the system.