Gigabyte GA-7A8DRL User Manual page 33

1) JP1 (PCI-X Bus Speedy Function)
2) JP2 (PCI-X Bus Speedy Function)
1
1-2 close: Enable PCI-X 3 & 4 and SCSI
100/133 Mhz (default)
1
2-3 close: Enable PCI-X 3 & 4 and SCSI
66Mhz
1
1-2 close: Enable PCI-X 1 & 2 and 545GM
100/133 Mhz (default)
1
2-3 close: Enable PCI-X 1 & 2 and 545GM
66Mhz
3 3
Jumper Setting