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Chapter 7: BIOS
SCU (Storage Control Unit) Confi guration
Storage Controller Unit
Select Enabled to enable PCH SCU storage devices. The options are Disabled
and Enabled.
OnChip SCU Option ROM
Select Enabled to support the onboard SCU Option ROM to boot up the system via
a storage device. The options are Disabled, Legacy Option ROM, and EFI Driver.
PCIe/PCI/PnP Confi guration
PCI ROM Priority
Use this feature to select the Option ROM to boot the system when there are mul-
tiple Option ROMs available in the system. The options are EFI Compatible ROM
and Legacy ROM.
PCI Latency Timer
Use this feature to set the latency Timer of each PCI device installed on a PCI bus.
Select 64 to set the PCI latency to 64 PCI clock cycles. The options are 32, 64, 96,
128, 160, 192, 224 and 248.
Above 4G Decoding (Available if the system supports 64-bit PCI decoding)
Select Enabled to decode a PCI device that supports 64-bit in the space above 4G
Address. The options are Enabled and Disabled.
PERR# Generation
Select Enabled to allow a PCI device to generate a PERR number for a PCI Bus
Signal Error Event. The options are Enabled and Disabled.
SERR# Generation
Select Enabled to allow a PCI device to generate an SERR number for a PCI Bus
Signal Error Event. The options are Enabled and Disabled.
Maximum Payload
Select Auto to allow the system BIOS to automatically set the maximum payload
value for a PCI-E device to enhance system performance. The options are Auto,
128 Bytes and 256 Bytes, 512 Bytes, 1024 Bytes, 2048 Bytes, and 4096 Bytes.
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