The 1655 will overspeed almost anything, although not always successfully, which is compliant with their comments about only working on certain media. I has some dollar store media, made in china, code of AN32, utter garbage. Rated at 4X, and actually works at that speed, although probably is only readable for a few weeks. I tried 1 at 16X, the burner was game, but it shat itself writing the lead in. Tried again at 8X, burned and verified, but not readable on standalone players.