Board itself (1)
Think I will start with the SATA ports first

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Fairly obviously there is 10 in total:
The top 6 are controlled by the Intel Z87 PCH. (Sata 1-6)
The bottom 4 are by 2 Asmedia chips (Sata G1-G4), Will ID and update the model.
Motherboard slots:
I think there isn't a need for me to point out which is which. Haha.
A unusual thing I noted is the opened ended PCIE 1X which can be used with longer cards without physically mauling the slots (The amour has to go thou, or you have to cut it)
Back I/O:
Need not say much here either.
The two buttons from top to bottom: CMOS Reset, ROG connect.
The 2 USB 3.0 Ports at the bottom of the LAN port are linked to the Intel Z87 PCH which the 4 USB are controlled by a Asmedia ASM1074.
USB3 header at it's usual position:
I would honestly prefer it to be at the bottom considering how long most USB3.0 internal cables are but so long it's not in a inaccessible position it's still pretty okay there.