Supermicro X7DWN Plus User Manual page 67

Chapter 4: BIOS
be cached (written) into a buffer, a storage area in the Static DROM (SDROM)
or written into L1, L2, L3 cache inside the CPU to speed up CPU operations.
Select Uncached to disable this function. Select Write Through to allow data
to be cached into the buffer and written into the system memory at the same
time. Select Write Protect to prevent data from being written into the extended
memory area above 1 MB. Select Write Back to allow the CPU to write data back
directly from the buffer without writing data to the System Memory for fast CPU
data processing and operation. The options are Uncached, Write Through, Write
Protect, and Write Back.
Discrete MTRR Allocation
If enabled, MTRRs (-Memory Type Range Registers) are confi gured as distinct,
separate units and cannot be overlapped. If enabled, the user can achieve
better graphic effects when using a Linux graphic driver that requires the write-
combining confi guration with 4GB or more memory. The options are Enabled
and Disabled.
PCI Confi guration
Access the submenu to make changes to the following settings for PCI devices.
Onboard GLAN1/Onboard GLAN2 (Gigabit- LAN) OPROM Confi gure
Select Enabled to allow the system to boot from the GLAN1 connection or the
GLAN 2 connection. The options are Enabled and Disabled.
IPMI 3rd-LAN OPROM Confi gure
Select Enabled to allow the system to boot from the IPMI 3rd-LAN connection.
The options are Disabled and Enabled.
Onboard Storage OPROM Confi gure
Select Enabled to allow the system to boot from the onboard storage device. The
options are Disabled and Enabled.
Option ROM Replacement
Select Enabled to enable to use the feature of Option ROM Chip Replacement. If
the system hangs due to this feature, reboot the system and change the setting.
The options are Enabled and Disabled.
ROM Scan Ordering
This feature allows the user to decide which Option ROM to be activated fi rst. The
options are Onboard fi rst and Add-On fi rst.
4-9