Sony Optiarc BD-5740H. DVD-R write speed: 8 x, DVD+R write speed: 8 x, DVD-RW write speed: 6 x. BD-R read speed: 6 x, BD-RE read speed: 6 x, DVD-ROM read speed: 8 x. DVD drive average random access time: 180 ms, CD-ROM drive average random access time: 190 ms, BD-ROM average random access time: 230 ms. Interface: SATA. Dimensions (WxDxH): 128 x 12.7 x 126 mm, Weight: 170 g