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Mainboard User’s Manual 

Selecting “Advanced Chipset Features” on the main program 
screen displays this menu: 

 

This option displays a table of items that define critical timing 
parameters of the motherboard. You should leave the items on this 
page at their default values unless you are very familiar with the 
technical specification of your system hardware. If you change the 
values incorrectly, you may introduce fatal errors or recurring 
instability into your system. 

 

DRAM Timing Selectable : Enables you to set the DRAM timing 
manually, or automatically using SPD (Serial Presence Detect). SPD 
is an EEPROM chip on the memory module that stores information 
about the memory chips it contains, including size, speed, voltage, 
row and column addresses, and manufacturer. We recommend setting 
this field to By SPD. 

 

CAS Latency Time : This item enables you to optimize the speed at 
which data is accessed in a column by defining CAS latency time. 
The CAS latency defines the time delay (in CLKs) before SDRAM 
starts a read command after receiving it. Because reading data in a 
row is twice as fast, reducing this number can increase performance 
at the expense of stability. We recommend that you leave this item at 
the default value. The default setting is “1.5”. 

 Advanced Chipset Features 

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