Foxconn C51XEM2AA User Manual page 22

Warning :
Be sure to unplug the AC power supply before adding or removing
expansion cards or other system peripherals, especially the
memory devices, otherwise your motherboard or the system
memory might be seriously damaged.
For the detailed memory support list on this motherboard, please visit the
website: http://www.foxconnchannel.com
Chapter 2 Installation Instructions
15