LG 6x WP50NB40 Slim Portable Blu-Ray Writer - Supports M-DISC and BDXL (Black, Retail Box) Operating requirements: Windows XP (SP 3 or higher), Vista (32 bit, 64 bit), 7, 8/8.1. CPU and RAM Requirements: Intel E6400 or higher (Core2Duo P8600 2.4GHz or higher recommended), 1GB RAM or larger Maximum burn speeds of 6x for BD-R, 8x for DVD-R/+R and 24x for CD-R, maximum read speeds of 6x for BD-R, 8x for DVD-R/+R and 24x for CD-R Maximum BD Dual Layer (DL) burn speed at 6x and read speed at 6x. Maximum DVD Dual Layer (DL) burn speed at 6x and read speed at 8x Buffer size of 4MB with Buffer Under-run prevention function embedded