DH87MC Memory Speed 1600 MHz running at 1333 MHz

I have recently bought Intel DH87MC motherboard for my 4th gen core i5 4430.

I also bought Corsair Vengeance DDR3 4GB x1 (CMZ4GX3M1A1600C9 http://www.corsair.com/memory-by-product-family/vengeance/vengeance-4gb-single-module-ddr3-memory-kit-cmz4gx3m1a1600c9.html) as RAM for my system.

My question is that my BIOS shows my RAM running at 1333 MHz instead of 1600 MHz as expected. Please guide me in setting my BIOS such that my RAM runs at 1600 MHz.

Best Regards

Iftikhar Ali