What is this port for? Never seen one before.

[Pez D Spencer]

What is this port for? It's on the Asus a8n32 board. Its the port I circled in red.

I could probably figure it out but Im too tired from work today. Ill just let one of you fine folks fill me in.

Thanks.

http://img442.imageshack.us/my.php?image=13131568023uh.jpg

 

[Crism]

External SATA of course