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MegaRUM PCI Motherboard User’s Guide24
Step 9 Attach Cables, Continued
Optional USB Cable You can only use a custom USB cable with this motherboard. You can order
this USB cable (AMI part number CBLKIT-USB-1) from American Megatrends
at 800-828-9264.
Warning
The pinout for the optional USB Cable Box is:
Pin 1 Red VCC
Pin 2 Green Data +
Pin 3 White Data -
Pin 4 Black Ground
Please make sure that the USB cable is correctly installed. Incorrect
installation will damage the motherboard.
J19, J20 USB Connectors J19 and J20 are 4-pin USB (Universal Serial Bus) connectors. The
pinouts are:
Pin Signal Description
1 VCC
2 Data+
3 Data–
4 Ground
J14 Enable Onboard PCI VGA J14 is a 2-pin berg that enables or disables the onboard PCI ATI
VGA controller. The J14 settings are:
Onboard PCI ATI VGA Setting J19 Setting
PCI VGA Enabled OPEN (Default)
PCI VGA Disabled Shorted
Cont’d