|[* 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.