CD-Rs can be written at 48X, while CD-RWs can be written at 32X. This Blu-ray Disc drive also features disc encryption capabilities, buffer underrun protection and automatic write speed adjustment in order to protect the user and prevent data from becoming lost. Asus includes what they call “E-Green” technology, which automatically shuts down unused applications relating to the Blu-ray drive, thus saving energy. Compared to the ASUS BC-06B1ST, this drive features faster disc access times by 100 MS: 250 MS for Blu-ray and 150 MS for DVD.