Nvidia 754 - Manual (Page 27)

Installation
Page 3-11
CUSB3
CUSB4
CUSB3/CUSB4/CUSB5: Six USB 2.0 ports
This mainboard includes additional USB2.0 ports,
identified by 10-pin connector.
If you wish to use the additional USB ports, install
the card-edge bracket to the system chassis then
insert its cables to this 10-pin connector.
CUSB5
CP80P: Post Port Debug LED
Provides two-digit POST code to show why the
system fail to boot. Allows quick and easy
optimization.
Post Port Debug 7-segment LED display
(Refer to Appendix C for POST codes)
RESET
PW-ON
EZ-Button — RESET, PW-ON:
These onboard buttons lets you turn on/off the
system easily, it is especially handy for debugging
or testing the system.
CAUTION !
If you purchased a separate USB
cable make sure it has the same pin
assignment. A different pin
assignment may damage the system.
If you need the USB cable, please
contact our retailer.