Supermicro X10DRT-PS User Manual page 67

PPIN Control
Select Unlock/Enable to use the Protected-Processor Inventory Number (PPIN)
control in the system. The options are Unlock/Enable and Unlock/Disable.
Hardware Prefetcher (Available when supported by the CPU)
If set to Enable, the hardware prefetcher will prefetch streams of data and instruc-
tions from the main memory to the L2 cache to improve CPU performance. The
options are Disable and Enable.
Adjacent Cache Prefetch (Available when supported by the CPU)
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 Disable and Enable.
Note: Please reboot the system for the changes made on this setting to
take effect. Please refer to Intel's website for detailed information.
DCU (Data Cache Unit) Streamer Prefetcher (Available when supported by
the CPU)
If set to Enable, the DCU Streamer prefetcher will prefetch data streams from the
cache memory to the DCU (Data Cache Unit) to speed up data accessing and
processing to enhance CPU performance. The options are Disable and Enable.
DCU IP Prefetcher
If set to Enable, the IP prefetcher in the DCU (Data Cache Unit) will prefetch IP
addresses to improve network connectivity and system performance. The options
are Enable and Disable.
Direct Cache Access (DCA)
Select Enable to use the Intel DCA (Direct Cache Access) Technology to improve
the efficiency of data transferring and accessing. The options are Auto, Enable,
and Disable.
X2 APIC (Advanced Programmable Interrupt Controller)
Based on Intel's Hyper-Threading architecture, each logical processor (thread) is
assigned 256 APIC IDs (APIDs) in 8-bit bandwidth. When this feature is set to En-
able, the APIC ID will expand(X2) from 8 bits to 16 bits to provide 512 APIDs to
each thread to enhance CPU performance. The options are Disable and Enable.
AES-NI
Select Enable to use the Intel Advanced Encryption Standard (AES) New Instruc-
tions (NI) to ensure data security. The options are Enable and Disable.
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Chapter 4: AMI BIOS