Intel GA-8I955X ROYAL - Manual (Page 35)

BIOS Setup - 35 -
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CPU Hyper-Threading
Enabled Enables CPU Hyper Threading Feature. Please note that this feature is only
working for operating system with multi processors mode supported. (Default
value)
Disabled Disables CPU Hyper Threading.
Limit CPUID Max. to 3
Enabled Limit CPUID Maximum value to 3 when use older OS like NT4.
Disabled Disables CPUID Limit for windows XP.(Default value)
No-Execute Memory Protect (Note)
Enabled Enable No-Execute Memory Protect function.(Default value)
Disabled Disable No-Execute Memory Protect function.
CPU Enhanced Halt (C1E) (Note)
Enabled Enable CPU Enhanced Halt (C1E) function.(Default value)
Disabled Disable CPU Enhanced Halt (C1E) function.
CPU Thermal Monitor 2 (TM2) (Note)
Enabled Enable CPU Thermal Monitor 2 (TM2) function.(Default value)
Disabled Disable CPU Thermal Monitor 2 (TM2) function.
CPU EIST Function (Note)
Enabled Enable CPU EIST function.(Default value)
Disabled Disable CPU EIST function.
DRAM Data Integrity Mode
ECC Enable Memory Error Checking and Correction feature when all installed
DIMMs are 72bits width.
Non-ECC Set DRAM Data Integrity Mode to Non-ECC. (Default value)
(Note) This item will show up when you install a processor that supports this function.