CHAINTECH CT-5SSV Manual page 33

A. SDRAM CAS Latency
When set to Auto this feature will use "default" option to read CAS Latency from
the SPD of the DIMMs, with this mechanism the user's need only to reboot the
system to get a set of proper value of CAS Latency.
B. AGP Aperture Size (MB)
This function determines the amount of system memory that is given to the AGP
card. Options range from 4MB to 256MB. This is a dynamic memory allotment
in that the AGP card will only use the amount of memory that it needs. The
remaining memory not in use will be available for the system to use. For example,
if 16MB are alloted to the AGP card and the card only needs 8MB, the remaining
8MB will be available for system use.
C. System BIOS Cacheable
Enabling this function allows caching of the system BIOS ROM at F0000h-FFFFFh,
resulting in better system performance. However, if any program writes to this
memory area, a system error may result. Caching the system BIOS results in better
performance than shadowing the system BIOS as discussed in Section 3-2.
D. Video BIOS Cacheable
Enabling this function allows caching of the video BIOS ROM at C0000h-C7FFFh,
resulting in better video performance. However, if any program writes to this
memory area, a system error may result. Caching the video BIOS results in better
performance than shadowing the video BIOS as discussed in Section 3-2.
E. Memory Hole at 15M-16M
Enabling this function will reserve the memory address space between 15MB
and 16MB for ISA expansion cards. However, enabling this function will
result in not allowing the system to have access to memory above 16MB.
Please note that some expansion cards require this setting to be enabled.
F. PCI Delayed Transaction
The chipset has an embedded 32-bit posted write buffer to support delay transactions
cycles. Select Enabled to support compliance with PCI specification version 2.1.
G. Spectrum Spread
When Enabled this function will cause lower EMI by spreading the system
frequency spectrum. While this function decreases EMI, system stability may
be slightly compromised. Choosing Smart Clock will turn off the AGP, PCI, and
SDRAM clocks when not in use. Smart Clock does not perform a spectum
spreading function.
Award BIOS Setup Program
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