I just installed my new I\O Magic (benq 1655) flashed to benq 1655 retail BCBD firmware (checked UMDA 2 enabled) it's ok. I'm burning a data disc in Nero CD Speed and it's only burning @ 4x with a Verbatim MCC 004 16x disc. :a
It finished and it never burned above 4x!! The same cable, computer , etc had a 1640 in it before and had no problems burning at any speed.
Burst rate is 23mb\sec.