American Megatrends MegaDual User Manual page 84

Chipset Setup,
Continued
Watch Dog Timer Set this option to Enabled to use the MegaDual Watch Dog Timer. If the system locks
up, this timer will reset it. System lock is assumed if there is no PCI bus cycle for about 1.2
seconds. This option is useful in cases where the system must always be on. The settings
are Enabled or Disabled. The Optimal and Fail-Safe default settings are Disabled.
Graphics Aperture Size This option specifies the amount of memory aperture, or addressing, requested by
the Accelerated Graphics Port (AGP). In most cases, the 64 MB default setting should not
be changed unless specified in your AGP card manual.
This option has no relation to physical memory. A 64 MB aperture, for example, means
that the AGP card will be assigned a 64 MB address slot below 4 GB. This is regardless of
physical memory installed.
The settings are 4 MB, 8 MB, 16 MB, 32 MB, 64 MB, 128 MB, or 256 MB. The Optimal
and Fail-Safe default settings are 64 MB.
Memory ECC Mode Set this option to H/W ECC to allow automatic detection and correction of single-bit
ECC errors. Set this option to S/W ECC to allow the chipset to correct ECC errors, and
AMIBIOS to log the ECC errors. The settings are Disabled, S/W ECC, or H/W ECC. The
Optimal and Fail-Safe default settings are Disabled.
78 MegaDual PCI Motherboard User's Guide