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CPU Conguration
► C1E Support
C1E represents Enhanced HALT State. It is a feature which Intel CPU uses to reduce power
consumption when in halt state. C1E drops the CPU's multiplier and voltage to lower levels
when a HLT (halt) command is issued. This item is used to enable/disable the C1E support.
When disabled, the processor will only retrieve the currently requested cache line.
► Hardware Prefetcher
The processor has a hardware prefetcher that automatically analyzes its requirements and
prefetches data and instructions from the memory into the Level 2 cache that are likely to be
required in the near future. This reduces the latency associated with memory reads.
When enabled, the processor’s hardware prefetcher will be enabled and allowed to automati-
cally prefetch data and code for the processor.
When disabled, the processor’s hardware prefetcher will be disabled.
► Adjacent Cache Line Prefetcher (Appears only when CPU supports)
The processor has a hardware adjacent cache line prefetch mechanism that automatically
fetches an extra 64-byte cache line whenever the processor requests for a 64-byte cache line.
This reduces cache latency by making the next cache line immediately available if the proces-
sor requires it as well.
When enabled, the processor will retrieve the currently requested cache line, as well as the
subsequent cache line.
► Limit CPUID MaxVal
This item is used to enable or disable CPUID maximum value limit conguration. Set Limit
CPUID MaxVal to 3, it should be [Disabled] for WinXP.
► Execute Disable Bit
This item is used to enable/disable the Execute Disable Bit feature.
Intel's Execute Disable Bit functionality can help prevent certain classes of malicious buffer
overow attacks when combined with a supporting operating system.
Execute Disable Bit allows the processor to classify areas in memory by where application
code can execute and where it cannot. When a malicious worm attempts to insert code in the
buffer, the processor disables code execution, preventing damage and worm propagation.
CMOS Setup Utility - Copyright (C) 1985-2006, American Megatrends, Inc.
CPU Conguration
Configure advanced CPU settings Help Item
Module Version:3F.11
Manufacturer : Intel This can enable
Intel(R) Core(TM)2 Duo CPU E4700 @2.00GHz in order to enable or
Speed : 2.60GHz disable the “Enhanced
FSB Speed : 800MHz Halt State”.
Cache L1 :64 KB
Cache L2 :2048KB
Ratio Status:Unlocked (Min:06, Max:13)
Ratio Actual Value:13
C1E Fu nction [Enabled]
Hardware Prefetcher [Enabled]
Adjacent Cache Line Prefetch [Enabled]
Limit CPUID MaxVal [Disabled]
Execute Disable Bit [Enabled]
Core Multi-Processing [Enabled]
↑↓←→:Move Enter:Select +/-/:Value F10:Save ESC:Exit F1:General Help
F9:Optimized Defaults
[Enabled]