Gigabyte GA-6SMM7 User Manual page 13

6SMM7
Video BIOS Shadow
It determines whether video BIOS is able to copy to RAM, however, it is
optional from chipset design. Video Shadow will increase the video
speed.
The default value is Enabled.
Enabled Video shadow is enabled
Disabled Video shadow is disabled
C8000 - CFFFF Shadow / D0000 - DFFFF Shadow
These categories determine whether optional ROM will be copied to
RAM by 16 byte.
The default value are Disabled.
Enabled Optional shadow is enabled.
Disabled Optional shadow is disabled.
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