The Proprietary "All-in-One" Front Panel Connector. The board uses a single, massive ribbon-cable header for all front panel connections (power switch, LEDs, USB, Audio). While this makes assembly fast for the factory, it is a nightmare for anyone trying to移植 (transplant) the board into a custom case, effectively locking the motherboard into the Acer chassis unless you are handy with a soldering iron.
The Acer Ironman SK is a mini-ITX motherboard based on the Intel H55 chipset, supporting 2nd generation Core processors (LGA 1156 socket). Here are its key specs: acer ironman-sk motherboard specs