Hyper-threading, Active processor cores, Limit cpuid maximum – IBASE IPPCXXA9-RE User Manual
Page 40: Execute disable bit, Intel virtualization technology, Hardware prefetcher, Adjacent cache line prefetch

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IPPCxxA9-RE User Manual
Hyper-threading
Enabled for Windows XP and Linux (OS optimized for Hyper-Threading Technology)
and Disabled for other OS (OS not optimized for Hyper-Threading Technology). When
Disabled, only one thread per enabled core is enabled.
Active Processor Cores
Number of cores to enable in each processor package.
Limit CPUID Maximum
Disabled for Windows XP.
Execute Disable Bit
XD can prevent certain classes of malicious buffer overflow attacks when combined
with a supporting OS (Windows Server 2003 SP1, Windows XP SP2, SuSE Linux 9.2,
Re33dHat Enterprise 3 Update 3.)
Intel Virtualization Technology
When enabled, a VMM can utilize the additional hardware capabilities provided by
Vanderpool Technology.
Hardware Prefetcher
To turn on/off the Mid level Cache (L2) streamer Prefetcher.
Adjacent Cache Line Prefetch
To turn on/off prefetching of adjacent cache lines.