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Chapter 4: UEFI BIOS
Adjacent Cache Prefetch (Available when supported by the CPU)
The CPU prefetches the cache line for 64 bytes if this feature is set to Disabled. The CPU
prefetches both cache lines for 128 bytes as comprised if this feature is set to Enable. The
options are Enable and Disable.
DCU Streamer Prefetcher (Available when supported by the CPU)
Select Enable to enable the DCU (Data Cache Unit) Streamer Prefetcher, which will stream
and prefetch data and send it to the Level 1 data cache to improve data processing and
system performance. The options are Enable and Disable.
DCU IP Prefetcher (Available when supported by the CPU)
Select Enable for DCU (Data Cache Unit) IP Prefetcher support, which will prefetch IP
addresses to improve network connectivity and system performance. The options are Enable
and Disable.
LLC Prefetch
If set to Enable, the hardware prefetcher will prefetch streams of data and instructions from
the main memory to the L3 cache to improve CPU performance. The options are Disable
and Enable.
DCU Mode
Use this feature to set the data prefetching mode. A write of "1" selects the DCU mode as
16KB 4-way with ECC. The options are 32KB 8Way Without ECC and 16KB 4Way With ECC.
Extended APIC
Select Enable to activate Advanced Programmable Interrupt Controller (APIC) support. The
options are Disable and Enable.
AES-NI
Select Enable to use the Intel Advanced Encryption Standard (AES) New Instructions (NI) to
ensure data security. The options are Disable and Enable.
APIC Physical Mode
Use this feature to enable the APIC physical destination mode. The options are Disable and
Enable.
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