HP 443903-001. CD write speed: 24 x, CD rewrite speed: 16 x, DVD+R write speed: 8 x. CD read speed: 24 x, DVD-ROM read speed: 8 x. DVD drive average random access time: 230 ms, CD-ROM drive average random access time: 175 ms. Optical drive type: DVD±RW, Interface: EIDE/ATA