THis small cable allows your motherboard to send digital sound to your graphic card, so when you connect an HDMI monitor or screen, both video AND sound are transferred from the same 1 cable.
How to connect an HDMI-S/PDIF cable from your VGA card to your Mainboard.
The HDMI-S/PDIF cable allows you to route audio from your mainboard to your VGA card.
This allwos audio to be output from the HDMI connector on your VGA card as per HDMI specifications.
Note that audio can also be output to the VGA DVI connector that has a DVI-to-HDMI converter attached to it.
example:
Mainboard : Albatron PXP35 v2.0
VGA Card: Albatron 8600GT
1) Locate your HDMI-S/PDIF cable (as shown above).
Note: Shutdown your system before attaching the cable.
2) Locate the HDMI-S/PDIF connector on your VGA card
(in this example, the J8 connector is the correct HDMI-S/PDIF connector for an Albatron 8600GT).
Note: The location of the HDMI-S/PDIF connector on your VGA card may differ depending on your specific model.
3) Attach one end of the cable to the HDMI-S/PDIF connector of the VGA Card.
Note: Left side - HDMI signal, Right-side ¡V Ground
Also , the pin definitions may vary depending on your specific VGA model.
4) Locate the S/PDIF out header on the mainboard.
Note: Refer to your mainboard manual for the exact S/PDIF header pin outs
(e.g. Albatron PX35 v2.0: Pin #1 - S/PDIF out, Pin #2 - Ground)
5) Connect the other end of the cable to the S/PDIF out header on the mainboard.
6) You have completed the HDMI-S/PDIF cable installation.
You can now connect HDMI devices to your VGA card using the card¡¦s HDMI connector
or DVI connector (DVI connector needs an DVI-to-HDMI adapter).