You burned at 16x? It's really weird, if I do things at 12x CAV everything is nice and quiet, but if I use 16X CAV or any speed with P-CAV using C0deking's fastburn firmware, it suddenly becomes very noisy. It may have something to do with the frequency, once it reaches 16x RPM the frequency will turn the damping mechanism into a vibration acceleration mechanism; that's sort of like when you're on a swing, if you time your push well you'll swing higher and higher, any faster or slower will cause you to stop.
So it could be that Liteon fixed a design defect with 20X, or that the problem only happens at 16x, at 20x it's not a concern
As for the 1655 it actually surpassed my expectations. My old 1655 makes some noise at 16x, but the new one doesn't make any sounds at all even during a full 16x transfer rate test. I don't know if it's got anything to do with aging though, but at least I know it won't turn into another Liteon :iagree: