Asus P1-PH1 - Manual (Page 34)

2-18 Chapter 2: Basic installation
2.9.2 Recommended optical drive dimension
You must consider the following optical drive requirements when installing
a new optical drive or replacing a defective one.
We recommend that you install and use an ASUS optical drive on this
system.
Optical drive buttons
The stop/eject button area of the DVD/CD-ROM drive should be less than
or equal to 21.9 millimeters from the right edge of the drive.
≤
21.9mm
↓ ↓
Optical drive tray
The optical drive tray door should not exceed 4.5 millimeters from the
bottom edge of the drive tray. The height of the bottom edge of the drive
tray should be less than or equal to 13 millimeters in parallel with the lower
drive screw holes.
≤
13mm
≤
4.5mm