Gigabyte GA-990FXA-UD3 User Manual page 38

CPU Host Clock Control, CPU Frequency (MHz), Set Memory Clock, Memory Clock
The settings under the four items above are synchronous to those under the same items on the MB In-
telligent Tweaker(M.I.T.) main menu.
DCTs Mode
Allows you to set memory control mode.
Ganged Sets memory control mode to single dual-channel.
Unganged Sets memory control mode to two single-channel. (Default)
DDR3 Timing Items
Manual allows all DDR3 Timing items below to be configurable.
Options are: Auto (default), Manual.
1T/2T Command Timing
Options are: Auto (default), 1T, 2T.
CAS# latency
Options are: Auto (default), 4T~12T.
RAS to CAS R/W Delay
Options are: Auto (default), 5T~12T.
Row Precharge Time
Options are: Auto (default), 5T~12T.
Minimum RAS Active Time
Options are: Auto (default), 15T~30T.
TwTr Command Delay
Options are: Auto (default), 4T~7T.
Trfc0 for DIMM1, DIMM3
Options are: Auto (default), 90ns, 110ns, 160ns, 300ns, 350ns.
Trfc2 for DIMM2, DIMM4
Options are: Auto (default), 90ns, 110ns, 160ns, 300ns, 350ns.
Write Recovery Time
Options are: Auto (default), 5T~8T, 10T, 12T.
Precharge Time
Options are: Auto (default), 4T~7T.
Row Cycle Time
Options are: Auto (default), 11T~42T.
RAS to RAS Delay
Options are: Auto (default), 4T~7T.
** DCTs Drive Strength **
ProcOdt(ohms)
Options are: Auto (default), 240, 120, 60.
DQS Drive Strength
Options are: Auto (default), 0.75x, 1.0x, 1.25x, 1.5x.
BIOS Setup - 38 -