Asus RS700-E7/RS8 - Manual (Page 42)

Chapter 2: Hardware setup 2-24
2. Press the latch leftward, and push
the slim optical drive toward the
front panel.
2.8.3 Slim type optical drive (optional)
To uninstall the slim optical drive:
1. Disconnect the SATA power and
cable, then locate the optical drive
eject latch at the rear side.