… writing a Verbatim branded 16x DVD+R (YUDEN000 T03) at 20x
The setup is a three-year old Intel Pentium M 760 Dothan 2 GHz laptop with USB connection to the Cypress AT2 based enclosure.
Some programs like IE7, Windows Live Messenger, and a couple of others running in the bacground during all the following tests.
Create Disc - the drive almost reaches 18x but not quite
Transfer rate test - the drive reaches 16x and 22-23 MB/s burst rate
Quality scanning at maximum speed (16x) is for some reason only performed at 13x
Another quality scan at 16x - this time the achieved speed is the same as the requested speed
With a faster computer, this drive in a Cypress AT2 based enclosure might be able to reach 18x or more.
In any case, it seems to me that it works as well as can be expected.