Sony NEC Optiarc AD-7190A 20X 20x DVD&plusmn;RW IDE Dual-Layer Drive internal DVD Burner Black bezel, Cache: 2 MByte Interface: E-IDE / ATAPI Write Speed: DVD-R: 20x max. DVD +R: 20x max.DVD-RW: 6x max. DVD +RW: 8x max.DVD-R DL: 8x max. DVD +R9: 8x max.DVD-RAM: 12x max.CD-R: 48x max. CD-RW: 32x max. Interface: E-IDE / ATAPI ;Access time: DVD: 160 ms CD: 140 ms ;Burst transfer rate: PIO mode 4 / Ultra DMA 66 ;Read Speed: DVD: 16x max. CD: 48x max. Writing methods : DAO, SAO, TAO with zero gap, variable or fixed packet, multisession;Compatibility :MPC Level 3, MultiRead, PC2001 Weight: 0.6 kg; Dimensions: 148 mm x 42 mm x 170 mm