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Features
The DW1620 is capable of reading and writing CD
media at 40x. While not as fast as some of its competitors, the
difference between 40x and 48x is quite minimal.
Unlike a few 16x writers we have looked at
previously, the DW1620 is capable of writing to both DVD+R and DVD-R discs at
16x. It is also capable of writing to re-writable media at 4x.
The DW1620 adds full support for DVD+R DL media
and is capable of writing to these discs at 2.4x. This is still
considered a first gen double layer writer. Only NEC and Pioneer seem to
be the only manufacturers release second gen 4x double layer writers.
BenQ
drives also carry their own exclusive features as follows:
As writing speed is increased, signal loss
becomes the key cause of a Significant decrease in writing quality. BenQ’s
High-Speed Signal Algorithm manages the high EFM(Eight-to-Fourteen Modulation)
frequency signal loss that often takes place at high-speed writing - ensuring
superb writing quality.
Unlike other drives which preset the writing
power before the actual writing of data, the WOPC II (Walking Optimal Power
Control II) algorithm constantly evaluates writing quality and adjusts the
writing power accordingly in order to ensure optimal writing quality over the
entire disc. The BLER OPC (Block Error Rate Optimal Power Control) further
enhances the writing quality near the end of the disc, where the risk of
warping is higher.
Installation
As with any DVD writer, installation was a
breeze in Window XP and was identified properly in Device Manger.
All supported features were identified using
Nero's InfoTool. This drive does not support DVD-RAM and Mt. Rainer.
The firmware on our OEM sample was B7C9 but we flashed the drive with the
latest firmware for testing, B7K9.
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