Chapter 6: UEFI BIOS
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Isoc Mode
Select Enable to enable Isochronous support to meet QoS (Quality of Service) require-
ments. This feature is especially important for Virtualization Technology. The options are
Disable, Enable, and
Auto
.
Memory Configuration
Integrated Memory Controller (iMC)
Enforce POR
Select Enable to enforce POR restrictions on DDR4 frequency and voltage programming.
The options are
POR
and Disable.
PPR Type
Post Package Repair (PPR) is a new feature available for the DDR4 Technology. PPR
provides additional spare capacity within a DDR4 DRAM module that is used to replace
faulty cell areas detected during system boot. PPR offers two types of memory repairs.
Soft Post Package Repair (sPPR) provides a quick, temporary fix on a raw element in a
bank group of a DDR4 DRAM device, while hard Post Package Repair (hPPR) will take
a longer time to provide permanent repair on a raw element. The options are
Auto
, Hard
PPR, Soft PPR, and PPR Disabled.
Memory Frequency
Use this feature to set the maximum memory frequency for onboard memory modules.
The options are
Auto
,
1866, 2000, 2133, 2400, 2666, and 2933. (
Note:
2933 MHz mem-
ory is supported by 2nd Gen Intel Xeon Scalable-SP (82xx/62xx series) processors only.)
Data Scrambling for NVMDIMM
Select Enable to enable data scrambling to enhance system performance and data in-
tegrity. The options are
Auto
, Disable, and Enable.
Data Scrambling for DDR4
Use this feature to enable data scrambling for DDR4.
The options are
Auto
, Disable,
and Enable.
Enable ADR
Select Enable for ADR (Automatic Diagnostic Repository) support to enhance memory
performance. The options are
Disable
and Enable.
Refresh Options
Use this feature to select the self refresh mode. The options are Accelerated Self Refresh
and
2x Refresh
.
