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6. ATX Power Connector
The ATX power supply uses 20-pin connector shown below. Make sure you plug in the
right direction.
7. Support 2
This motherboard provides eight USB ports to connect USB devices, such as mouse,
keyboard, modem, printer, etc. There are two connectors on the PC99 back panel. You
can use proper cables to connect the other USB connectors to the USB modules or front
panel of chassis. Please note that USB3 and USB4 support USB2.0. Compared to
traditional USB 1.0/1.1 with the speed of 12Mbps, USB 2.0 (Optional) has a fancy speed
up to 480Mbps, which is 40 times faster than the traditional one.
Pin 1
USB3 and USB4 Connector
Pin 1
1
2
USBPWR0
USBPWR0
USB_FP_P1-
USB_FP_P0-
USB_FP_P1+
USB_FP_P0+
GND
USB2 Connector
GND
USB_FP_OC0
KEY
COM
+5V
COM
+3.3V
+3.3V
+3.3V
-12V
COM
PS-ON
COM
nd
rd
th
, 3
and 4
USB Ports
8. Connecting IDE, Floppy Cables
Connect 34-pin floppy cable and 40-pin IDE cable to floppy connector FDC connector. Be
careful of the pin1 orientation. Wrong orientation may cause system damage.
+5V
COM
PW-OK
5VSB
+12V
+5V
+5V
-5V
COM
COM
9. Connecting Front Panel Cable
Attach the power LED, speaker, and reset switch connectors
to the corresponding pins. If you enable "Suspend Mode"
item in BIOS Setup, the ACPI & Power LED will keep
flashing while the system is in suspend mode.
Locate the power switch cable from your ATX housing. It is
2-pin female connector from the housing front panel. Plug
this connector to the soft-power switch connector marked
SPWR.
IDE 1 (Primary)
IDE 2 (Secondary)
Pin 1
ATA 66/100/133
IDE Connector
Pin 1
FDD Connector
1
+
IDE LED
+
+
+
+
Speaker
1
NC
SPWR
NC
GND
+5V
ACPI LED-
IDE LED
GND
IDE LED
ACPILED
+5V
NC
+5V
NC
GND
GND
NC
RESET
SPEAKER
GND
SPWR
ACPI & PWR
LED
Reset
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