Asus X99-S - 2.3 Motherboard rear and audio connections

2-12
Chapter 2: Basic installation
Chapter 2
2.3 Motherboard rear and audio connections
2.3.1 Rear I/O connection
*, and **: Refer to the tables on the next page for LAN port LEDs and audio port definitions.
Rear panel connectors
1.
Intel
®
LAN port * 6. USB 3.0 ports E56 (Supports USB 3.0
Boost)
2.
USB 2.0 ports 5-6 (Bottom port
supports USB BIOS Flashback)
7. USB 3.0 ports E34 (Supports USB 3.0
Boost)
3.
USB BIOS Flashback button 8. Optical S/PDIF Out port
4.
USB 3.0 ports E910 (Supports USB
3.0 Boost)
9. Audio I/O ports**
5. USB 3.0 ports E78 (Supports USB
3.0 Boost)