Biostar M6TSU User Manual page 48

Chapter 2
Video BIOS Cacheable
Select Enabled allows caching of the video BIOS, resulting in better system
performance. However, if any program writes to this memory area, a system error
may result.
The Choices: Disabled (default), Enabled.
AGP Graphics Aperture Size
This field lets you insert a timing delay between the CAS and RAS strobe signals,
used when DRAM is written to, read from, or refreshed. Fast gives faster
performance; and Slow gives more stable performance. This field applies only
when synchronous DRAM is installed in the system.
The Choices: 64MB (default), 132MB.
System Memory Frequency
This item allows you to select system memory frequency.
The Choices: Auto (default), 133MHz, 100 MHz.
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BIOS Setup