MD doesn't read memory size

[sfgcss72]

Hello all,
2 8GB Dual Channel DDR3 Memory Kit (CMZ8GX3M2A1866C9), ASRock Z97 Pro4 read only 4 MGB of each stick ??
Any thoughts ??
Tnx

Yair

 

[Calvin7]

CMZ8GX3M2A1866C9
Memory Size
8GB Kit (2 x 4GB)
http://www.corsair.com/en-us/vengeance-8gb-dual-channel-ddr3-memory-kit-cmz8gx3m2a1866c9