USB Port looks strange

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i got a new laptop, googled to find out what the port is as i have one also. Tried usb and e-sata cables, neither fit! im stumped as to what it could be! anyone got any other ideas?
 
If you search 'weird USB port', it brings up this thread. Much debate was had over my Acer 5750Z-4835's mystery port.

I eventually RTFM'd my paper manual, and in the diagram for this side of the laptop, it says, "USB 2.0 / 3.0* port", but reading it carefully seems to indicate it would be blue if we had the proper model with USB 3.0.

20130924_171601_cr_sm.jpg


Sorry for necro'ing the thread, but I was positively influenced by XKCD.