My ram is not clocked at 1600mhz?

745i

Honorable
Jul 9, 2013
8
0
10,510
Ram : Corsair Vengeance 16gb at 1600mhz (4x4gb)
Motherboard: ASUS P8Z77-V
On CPU-Z it shows dram frequency is around 668.7 mhz, so is it normal or what do I do to make it normally 1600 mhz on the Asus p8z77-v?
 
Solution
That's showing you are running roughly at 1333, go into BIOS, enable XMP and select profile 1, should be at 1600 then (will show 800 (true freq) in CPU_Z (take that times 2, as is DOUBLE data rate, to get the 1600 effective)