BOAC, apologies, you are right - DriveSpeed doesn't affect write speed. I could have sworn it did.
It can be a bit odd to configure - it has to start when you log on to detect the drive(s).
It's useful in keeping the read speed down in Win 7 when playing audio CDs so that it doesn't spin the drive to the max on playback and drown out the music! This is a "feature" of Win 7 that I raised with MS back in 2011, and they eventually corrected it - at least for pressed CDs, but CD-Rs still want to play at 54X.
Yes, I meant cleaning the player lens.
SD