User manual

ASUS X99-A II
2-13
Chapter 2
2.3 Motherboard rear and audio connections
2.3.1 Rear I/O connection
Rear panel connectors
1.
USB BIOS Flashback 7. USB3.0portsE34(SupportsUSB3.0
Boost)
2. PS/2 keyboard/mouse port 8. USB3.0portsE2_5(Bottomport
supports USB BIOS Flashback)
3. Intel
®
LAN port 9. USB3.1portEC1
(supports USB 3.1 Boost)
4. USB3.1portEA2 10. Optical S/PDIF Out port
5. USB 2.0 ports 78 11. Audio I/O ports**
6. USB 2.0 ports 910
* and **: Refer to the tables on the next page for LAN port LEDs and audio port denitions.