User`s manual

BIOS Setup 3-11
DRAM Clock:
This item sets the DRAM clock of your DRAM module. The system may be unstable or unable to boot up
if your DRAM module does not support the clock you set.
When set to [By SPD], the BIOS will read the DRAM module SPD data and automatically set the DRAM
clock by the value stored in it.
DRAM Timing Selectable:
Four options are available: Manual  By SPD  Turbo  Ultra. The default setting is By SPD. When
set to “By SPD”, the BIOS will read the DRAM module SPD data and automatically set to the values
stored in it. The following items will be available to make adjustments by selecting option [Manual].
 CAS Latency Time
 Bank Interleave
 Precharge to Act. (Trp)
 Act. to Precharge (Tras)
 Active to CMD (Trcd)
 Ref to Active (Trfc)
 Active to Active (Trrd)
DRAM Bus Selection:
This item selects the memory channel among [Single], [Dual], or [Auto].
DRAM Command Rate:
Two options are available: 2T Command or 1T Command. The default setting is 2T Command. When the
host (northbridge) locates the desired memory address, it then processes the wait state of commands. Set
it to 2T Command for system compatibility or to 1T Command for system performance.
DDR DQS Input Delay:
Two options are available: Auto or Manual. The default setting is Auto. If you set to Manual, then the
next item will be available.
 DQS Input Delay Value:
This item allows you to adjust the data input strobe delay time of memory. You can key in the HEX
number into this section.
DDR DQS Output Delay:
Two options are available: [Auto] or [Manual]. The following items will be available to make
adjustments by selecting option [Manual].
 Ch. A DQS Output Delay
 Ch. B DQS Output Delay
 Ch. A MD Output Delay
User’s Manual