Asus M5A97 EVO R2.0
AI Overclock Tuner default setting to [Auto]

You can set this to manual or DOCP.

If you choose [Manual]
You can enter memory frequency manually. [DDR-1600MHz]
Manually set DRAM Timing Control
9-9-9-24 - First number is CAS# Latency followed by next three.

-or-

If you choose DOCP, the CPU settings may also be overclocked in addition to memory parameters being set to rated speeds.