Before you jump and on me and tell me to use DriveSpeed, I did.
Currently I have a ND-3520 and today I replaced a dead Lite-On CD-RW drive with a ND-3550.
So, when I play a pressed DVD in the ND-3520, it's really quiet, however, when I play the same DVD in the ND-3550 the drive is really loud. Sounds like it's reading at 16X.
I used DriveSpeed, but only half the options come up and it says the drive's max speed is 12X. This happens with both firmware 1.05 and 1.06.