Aaeon SBC-659P User Manual page 67

RAS-to-CAS Override
Select the display cache clock periods control.
The choice:Fast,Slow
RAS#Timing
This item controls RAS#active to Protegra, and refresh to RAS#
active delay(in local memory clocks),
RAS#Percharge Timing
This item controls RAS#precharge(in local memory clocks).
The choice: Fast,Slow.
Chapter 3 Award BIOS Setup 57