Supermicro X12SAE User Manual page 77

Max TOLUD (Top of Low Usable DRAM)
This feature sets the maximum TOLUD value, which specifies the "Top of Low Usable
DRAM" memory space to be used by internal graphics devices, GTT Stolen Memory,
and TSEG, respectively, if these devices are enabled. The options are Dynamic, 1
GB, 1.25 GB, 1.5 GB, 1.75 GB, 2 GB, 2.25 GB, 2.5 GB, 2.75 GB, 3 GB, 3.25 GB,
and 3.5 GB.
Note: TSEG is a block of memory that is only accessible by the processor while
operating in System Management Mode (SMM).
Memory Scrambler
This feature enables memory scrambler support for memory error correction. The op-
tions are Disabled and Enabled.
Force ColdReset
Use this feature when ColdBoot is required during MRC execution. The options are
Disabled and Enabled.
Force Single Rank
When enabled, only Rank0 will be use in each DIMM. The options are Disabled and
Enabled.
Memory Remap
PCI memory resources will overlap with the total physical memory if 4GB of memory (or
above) is installed on the motherboard. When this occurs, Enable this function to real-
locate the overlapped physical memory to a location above the total physical memory
to resolve the memory overlap-ping situation. The options are Disabled and Enabled.
MRC Fast Boot
This feature enables or disables fast path through MRC. The options are Disabled
and Enabled.
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Chapter 4: UEFI BIOS