RAM 1600Mhz not available?

[Crowned]

Hello,

 

I've purchased the following RAM sticks: 

Crucial Ballistix Tactical - DDR3

16 GB : 2 x 8 GB - DIMM 240-pins - 1600 MHz / PC3-12800 - CL8

 

Though I noticed these specifications weren't set in BIOS. So I checked it out.

I had to manually set the CAS latency to 8. That went well. 

 

However I cannot set it to 1600Mhz.. My motherboard (Asrock C216 WS) supposedly supports it...

 

I've attached some screenshots for clarification.

 

160305165200.BMP

160305165207.BMP

 

Any suggestions?