Gigabyte GA-6VTXD User Manual page 49

32 MB Display AGP Aperture Size is 32MB.
64 MB Display AGP Aperture Size is 64MB. (Default Value)
128 MB Display AGP Aperture Size is 128MB.
256 MB Display AGP Aperture Size is 256MB.
USB Controller
All USB Port Enable All USB Ports 0,1,2,3. (Default Value)
Disabled Disable USB Controller.
USB Port 0&1 Enable USB Ports 0&1.
USB Port 2&3 Enable USB Ports 2&3.
USB Legacy Support
Keyboard Enable USB Legacy Support for USB Keyboard.
Keyb+Mouse Enable USB Legacy Support for USB Keyboard/USB Mouse.
Disable USB Legacy Support Function . (Default Value)
Disabled
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BIOS Setup