DW1640 was the first BenQ DVDRW drive that matured during the years with with help from many firmware updates.
What made it special?
Not sure I remember it all right (hmm, we are now back in -05), but this was the first BenQ DVDRW burner that got it’s full potential and futures out of [B]QSuite[/B] utility. Book type setting, Test write, QScan, WOPC ans Solid Burn. But best of all IMO DW1640 is the best drive for OwerSpeed and OwerBurn DVD+R’s.
And a perfect scanner.
(Okey Quikee [now retired member] enabled many of the mentioned futures/ tweaks on DW1620 as well. )