Supermicro B13SEG Owner's Manual page 59

Package C State Control
Package C State
Use this feature to optimize and reduce CPU package power consumption in the idle
mode. Note that the changes you've made in this setting will affect all CPU cores or the
circuits of the entire system. The options are C0/C1 state, C2 state, C6 (non Retention)
state, C6 (Retention) state, No Limit, and Auto.
CPU1 Core Disable Bitmap
Available Bitmap:
This feature displays the available bitmap.
Disable Bitmap
Enter 0 to enable this feature for all CPU cores. Enter FFFFFFFFFFFFFFFF to disable this
feature for all CPU cores. Note that at least one core per CPU must be enabled. Disabling
all cores is not allowed. The default setting is 0.
Hyper-Threading (ALL)
Select Enable to use Intel Hyper-Threading Technology to enhance CPU performance. The
options are Disable and Enable.
Hardware Prefetcher
If this feature is set to Enable, the hardware prefetcher will prefetch data from the main system
memory to Level 2 cache to help expedite data transaction to enhance memory performance.
The options are Enable and Disable.
Adjacent Cache Prefetch
Select Enable for the CPU to prefetch both cache lines for 128 bytes as comprised. Select
Disable for the CPU to prefetch both cache lines for 64 bytes. The options are Enable and
Disable.
DCU Streamer Prefetcher
If this feature is set to Enable, the Data Cache Unit (DCU) streamer prefetcher will prefetch
data streams from the cache memory to the DCU to speed up data accessing and processing
to enhance CPU performance. The options are Enable and Disable.
DCU IP Prefetcher
This feature allows the system to use the sequential load history, which is based on the
instruction pointer of previous loads, to determine whether the system will prefetch additional
lines. The options are Enable and Disable.
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Chapter 4: UEFI BIOS