I have an 8gb set (2x4gb) of ADATA XPG V2 DDR3 1866MHZ. I am looking to get another set of this for 16 gb total. The problem I'm having is I can only find this in yellow, whereas mine is black. I've found 1600MHZ in black, but not 1866MHZ. Anyone know where I can get black 1866MHZ?