ok i was about to start my own thread and found this one after searching, i am having the exact same problem, i have the 40/12/40s and for the life of me have not been able to burn @ 40x, it always completes @ 24x. any higher, 32 or 40, it will give me errors. i have burned mp3’s, audio, mpg, avi, doenst matter if i use TAO or DAO. i have used sony, TY, verbatim, and fuji media, same problems.
i am using the 1.05 firmware on windows xp sp2.
when i burn using my ide nec3500ag dvd burner, it burns @ full speed no problems. I know the drive can read cd’s @ 40x, dont know if that matters for burning. i have never tried cdrw media. any ideas? i’ve checked the FAQ and plextor site, it says for audio it defaults to 24x, but just files in general will error out. i have disabled powerec and buffer underun protection to see if it made a diff, none at all. thanks in advance.