Am I able to add more RAM!?!

Dec 21, 2013
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So here is my set up
Motherboard - ASUS Z87-A http://www.newegg.com/Product/Product.aspx?Item=N82E16813131981

CPU - i5-4670k http://www.newegg.com/Product/Product.aspx?Item=N82E16819116899

CPU cooler - H100i http://www.newegg.com/Product/Product.aspx?Item=N82E16835181032

RAM - Corsair Vengeance Pro 2x4gb 1866mhzhttp://www.newegg.com/Product/Product.aspx?Item=N82E16820233530

GPU - MSI Geforce GTX 770 2gb oc/tf http://www.newegg.com/Product/Product.aspx?Item=N82E16814127741

Power Supply - Corsair RM850W http://www.newegg.com/Product/Product.aspx?Item=N82E16817139056

Okay sorry for that long description, I just wanted you guys to have the best idea of what is going on. I'm wondering, since I already have a 2x4gb 1866mhz vengeance pro installed into my motherboard...if i got the same EXACT copy...could I install it and get 16gb of RAM at 1866mhz?