ECS Elitegroup 755FX-A939 [27/83] Installing the motherboard

ECS Elitegroup 755FX-A939 [27/83] Installing the motherboard
21
Installing the Motherboard
Pin Signal Name
AUDIO1: Front Panel Audio header
This header allows the user to install auxiliary front-oriented microphone
and line-out ports for easier access.
1 AUD_MIC Front Panel Microphone input signal
2 AUD_GND Ground used by Analog Audio Circuits
3 AUD_MIC_BIAS Microphone Power
4 AUD_VCC Filtered +5V used by Analog Audio Circuits
5 AUD_F_R Right Channel audio signal to Front Panel
6 AUD_RET_R Right Channel Audio signal to Return from Front Panel
7 REVD Reserved
8 Key No Pin
9 AUD_F_L Left Channel Audio signal to Front Panel
10 AUD_RET_L Left Channel Audio signal to Return from Front Panel
Pin Signal Name Function
USB3/USB4: Front Panel USB headers
The motherboard has four USB ports installed on the rear edge I/O port array. Additionally,
some computer cases have USB ports at the front of the case. If you have this kind of case,
use auxiliary USB connector to connect the front-mounted ports to the motherboard.
Please make sure that the USB cable has the same pin assignment as indi-
cated above. A different pin assignment may cause damage or system hang-
up.
1 USBPWR Front Panel USB Power
2 USBPWR Front Panel USB Power
3 USB_FP_P0- USB Port 0 Negative Signal
4 USB_FP_P1- USB Port 1 Negative Signal
5 USB_FP_P0+ USB Port 0 Positive Signal
6 USB_FP_P1+ USB Port 1 Positive Signal
7 GND Ground
8 GND Ground
9 Key No pin
10 NC Not connected
SATA1/SATA2: Serial ATA connectors
These connectors are use to support the new Serial ATA devices for the highest date transfer
rates (150 MB/s), simpler disk drive cabling and easier PC assembly. It eliminates limitations
of the current Parallel ATA interface. But maintains register compatibility and software
compatibility with Parallel ATA.
1 Ground 2 TX+
3 TX- 4 Ground
5 RX- 6 RX+
7 Ground - -
Pin Signal Name
Pin Signal Name
Pin Signal Name Function

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