Changes to Step #13

Edit by Niyog Ray

Edit approved by Brett Hartt

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Step #13 Lines

[* black] Next up is the I/O board that plays host to one of the two USB 3.0 ports and the SD card reader.
[* black] We love that this Pro has USB 3.0 ports on both sides. At last we resolved the issues of cables that are 12.5" too short and thumb drives, mouse dongles, and [http://www.thinkgeek.com/brain/whereisit.cgi?t=USB&x=0&y=0|USB toys] that are a centimeter too wide.
[* red] The I/O board also plays host to a Broadcom [http://www.broadcom.com/products/Ethernet-Controllers/Enterprise-Client|BCM57100] series Gigabit Ethernet + Memory Card reader controller. The Ethernet controller is accessible through the separately-sold Thunderbolt adapter.
[* black] ParadeTech [http://www.paradetech.com/wp-content/uploads/2012/04/PS8401-Product-Brief-20110425.pdf|PS8401A] HDMI Jitter Cleaning 3Gpbs3Gbps HDMI repeater
[* black] ParadeTech [http://www.paradetech.com/wp-content/uploads/2012/04/PS8401-Product-Brief-20110425.pdf|PS8401A] HDMI Jitter Cleaning 3Gpbs3Gbps HDMI repeater