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X7DWE User's Manual
Intel VT for Direct I/O (VT-d)
Select Enable to enable the functionality of the Intel Virtualization Technology for
Direct I/O VT-d support by reporting the I/O device assignment to VMM through
the DMAR ACPI Tables. This feature offers fully-protected I/O resource-sharing
across the Intel platforms, providing the user with greater reliability, security
and availability in networking and data-sharing. The settings are Enabled and
Disabled. Press the <Enter> key to enter the submenu.
4GB PCI Hole Granularity
This feature allows you to select the granularity of PCI hole for PCI slots. If MTRRs
are not enough, this option may be used to reduce MTRR occupation. The options
are: 256 MB, 512 MB, 1GB and 2GB.
Memory Voltage Auto-Detect
Set to Enabled to allow the BIOS automatically detect the memory voltage accord-
ing to its SPD table. Select 1.5V-Forced to use low-power fully-buffered DIMMs
(FBDIMM). Select 1.8V-Forced to use 1.8V memory for testing. (Using the 1.8V-
Forced setting may be harmful to some 1.5V FBDIMM.) The options are: Auto-
Detect, 1.5V-Forced and 1.8V-Forced.
Memory Branch Mode
This option determines how the two memory branches operate. System address
space can either be interleaved between the two branches or Sequential from one
branch to another. Mirror mode allows data correction by maintaining two copies
of data in two branches. Single Channel 0 allows a single DIMM population dur-
ing system manufacturing. The options are Interleave, Sequential, Mirroring, and
Single Channel 0.
Branch 0 Rank Sparing/Branch 1 Rank Sparing
Select Enable to enable the function of memory sparing for Memory Bus Branch 0
or Branch 1. The options are Enabled and Disabled.
Branch 0 Rank Interleaving/Branch 1 Rank Interleaving
Select enable to enable Interleaved Memory for Memory Bus Branch 0 Rank or
Branch 1 Rank. The options for Memory Interleaving are 1:1, 2:1 and 4:1.
Enhanced x8 Detection
Select Enabled to enable Enhanced x8 DRAM UC Error Detection. The options
are Disabled and Enabled.
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