DFI-ITOX G4V300-D User Manual page 62

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Award BIOS Setup Utility
This field is used to select the local memory clock periods.
The options are 5, 6 and 7.
The options are 2 and 3.
This field controls RAS# precharge (in local memory clocks).
To enhance the memory speed of the system, set this field to
“Enabled”.
This field is used to select the memory clock speed of the DIMM.
When this field is enabled, accesses to the system BIOS ROM
addressed at F0000H-FFFFFH are cached, provided that the cache
controller is enabled. The larger the range of the Cache RAM, the
higher the efficiency of the system.
As with caching the system BIOS, enabling the Video BIOS cache will
allow access to video BIOS addresssed at C0000H to C7FFFH to
be cached, if the cache controller is also enabled. The larger the range
of the Cache RAM, the faster the video performance.
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By User If you want better performance for your system
other than the one “by SPD”, select “By User”.
Then select the best option in the “C AS Latency
Time” and “Active to Precharge Delay fields.