The PlexWriter's Plextor PX-891SAF and PX-891SAF PLUS 24X internal DVD/CD Super Multi Writer drives reads and writes DVD/CD at blazing fast speed of 24X. The PX-891SAF and PX-891SAF PLUS went through stringent testing procedures to ensure better compatibility for a wide variety of media brands currently available. They also incorporate a new improved chassis design to tremendously reduce noise and greatly improve writing quality. At 24X speed, air flow can cause bothersome acoustic noise. The PlexWriter's unique drive design regulates the air flows, reduces the amount of noise created, and enhances writing and reading quality.