Confused: LTR-32123S or LTR-32125W?

Recently I have flashed my Cendyne/Verbatim to a Lite-On LTR-32123S and everything seems to be fine.

However, when I run Nero CD Speed it tells me that my drive has CAV write mode, not Z-CLV as I expected after reading some posts here.

Does it mean that I actually have LTR-32125W which can be safely OC-ed to 48x?

Never mind. It turned out that the disc in the drive was not blank which explains everything.