Gigabyte GA-5SMM User Manual page 72

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Refresh Rate Control
The default value is 15.6us.
15.6us Set Refresh Rate Control function to 15.6us.
7.8us Set Refresh Rate Control function to 7.8us.
3.9us Set Refresh Rate Control function to 3.9us.
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Ref/Act Command Delay
The default value is 6T.
5T Set Ref/Act Command Delay to 5T.
6T Set Ref/Act Command Delay to 6T.
7T Set Ref/Act Command Delay to 7T.
8T Set Ref/Act Command Delay to 8T.
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RAS Precharge Time
The default value is 3T
2T Set RAS Precharge Time to 2T.
3T Set RAS Precharge Time to 3T.
4T Set RAS Precharge Time to 4T.
5T Set RAS Precharge Time to 5T.
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RAS to CAS Delay
The default value is 3T
2T Set RAS to CAS Delay to 2T.
3T Set RAS to CAS Delay to 3T.
4T Set RAS to CAS Delay to 4T.
5T Set RAS to CAS Delay to 5T.
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ISA Bus Clock Frequency
The default value is PCICLK/4
PCICLK/3 Set ISA Bus Clock Frequency to PCICLK/3.
PCICLK/4 Set ISA Bus Clock Frequency to PCICLK/4.
7.159MHz Set ISA Bus Clock Frequency to 7.159MHz.
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BIOS Configuration