Performance during DVD Discs Reading

 
Reading single-layer and dual-layer molded DVD-ROMs:
Plextor PX-716A (left) and PX-712A (right)

The PX-716A reads DVD Video discs at a lower speed than the older model does, so the total read time differs by more than a minute. But the two drives behave much alike to each other overall – there are fluctuations in speed and slowdowns on the outermost tracks. The slowdowns are bigger with the PX-712A due to the higher read speed and they start earlier than with the PX-716A. The dual-layer disc provoked no troubles with any of the drives: the read graph is clear and smooth. The read time of the two devices also coincides to a second in this case.