Chapter 6: UEFI BIOS
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Preferred IO
Options include Manual and Auto.
EDC Control
Electrical Design Current (EDC) is the total current capacity in amps that can be supplied to
the socket. Auto = use the fused VDDCR_CPU EDC limit. Manual = user can set a customized
VDDCR_CPU EDC limit.
xGMI Conguration
xGMI Link Width Control
Auto = use the default xGMI link width modulator settings. Manual = user can set the GMI
link width modulator settings.
xGMI Link Max Speed
Select the xGMI link max speed. Settings are 10.667Gbps, 11Gbps, 12Gbps, 13Gbps,
14Gbps, 15Gbps, 16Gbps, 17Gbps, 18Gbps, 19Gbps, 20Gbps, 21Gbps, 22Gbps and Auto.
Memory Conguration
Memory Clock
Auto and
supported frequencies.
Memory Interleaving
This setting controls fabric level memory interleaving. Note that the channel, die and socket
have requirements on memory populations and it will be ignored if the memory doesn't
support the selected option. The options are Disabled and Auto.
Memory Interleaving Size
This setting controls the memory interleaving size. This determines the starting address of
the interleave (bit 8, 9, 10 or 11). The options are 256 Bytes, 512 Bytes, 1 KB, 2 KB or Auto.
Chipset Interleaving
This setting controls interleave memory blocks across the DRAM chip for node 0. The
options are Disabled and Auto.
BankGroupSwap
This setting controls the Bank Group Swap. The options are Enabled, Disabled and Auto.
DRAM Scrub Time
This provides a value that is the number of hours to scrub memory. The options are
Disabled, 1 hour, 4 hours, 8 hours, 16 hours, 24 hours, 48 hours, and Auto.
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