MSI X99S GAMING 9 AC - Manual (Page 22)

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Back Panel Quick Guide
▶PS/2 Port
A PS/2 ® DIN connector is for a PS/2 ® mouse/keyboard.
▶Clear CMOS Button
There is CMOS RAM present on board that is powered by an external battery to store
system configuration data. Using CMOS RAM, the system can automatically boot into
the operating system (OS) every time it is turned on. If you wish to clear the system
configuration, press the button to clear the data.
▶USB 2.0 Port
The USB 2.0 port is for attaching USB 2.0 devices such as keyboard, mouse, or other
USB 2.0-compatible devices.
▶USB 3.0 Port
USB 3.0 port is backward-compatible with USB 2.0 devices. It supports data transfer
rate up to 5 Gbit/s (SuperSpeed).
Important
In order to use USB 3.0 devices, you must connect to a USB 3.0 port. If a USB cable
is used, it must be USB 3.0 compliant.
Optical
S/PDIF-Out
Line-In/ SS-Out
Line-Out RS-Out
CS-Out
USB 3.0 Port
Clear
CMOS
Button
LAN Port PS/2 Port*
USB 2.0 Port* USB 3.0 Port
USB 3.0 Port USB 3.0 Port
MIC
* Gaming Device Port