Does the Asus Z87-A able to have one stick of 8gb as memory?

[anobeseturkey]

Also is it as efficient as having two 4gb at dual channel?

 

[EvgaLover]

its a dual channel so wouldn't recommend putting 1 stick of ram in it. Better of with 2x4gb, and no its not as efficient as the motherboard is supported as dual channel