Memory Frequency Change in Bios file

I want to use my 1600 Mhz RAMs with my IPMSB-H61 board. In bios I found a setting named "Memory Freqency Limiter" with value 1333.
I have 2 questions;
- Is it possible to set this value 1600 and use the system with this frequency?
- Some sources write this board has 8 GB RAM limit some write 16 GB RAM limit? Can I check this from Bios file?

Thanks in advance.