Memory Upgrade: Dual Channel for a Rampage III?

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http://hardforum.com – Anyone know if this memory choice will work on an aging Rampage III Extreme? I've been scouring the net trying to see if the older x58 platforms can support dual channel memory configurations, but have been getting mixed messages. Been running 6GB of GSkill memory in triple channel since the beginning, but want to stretch some more life out of my current rig. If the board doesn't support dual channel--then what would be a good alternative memory option? (Hardware)