3 cpu configuration, Modify ratio support [disabled, C1e support [enabled – Asus P5B User Manual
Page 84: Max cpuid value limit [disabled, Cpu tm function [enabled, Execute disable function [enabled, Hyper-threading technology [enabled

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Chapter 2: BIOS setup
4.4.3
CPU Configuration
The items in this menu show the CPU-related information that the BIOS
automatically detects.
Configure advanced CPU settings
Module Version: 3C.0E
Manufacturer: Intel
Brand String: Intel(R) Pentium(R) 4 CPU 3.00GHz
Frequency : 3.00GHz
FSB Speed : 800MHz
Cache L1 : 16 KB
Cache L2 : 2048 KB
Ratio Status: Unlocked (Max:15, Min:14)
Ratio Actual Value: 15
CPUID : F43
Modify Ratio Support
[Disabled]
C1E Support
[Enabled]
Max CPUID Value Limit:
[Disabled]
CPU TM function
[Enabled]
Execute Disable Bit
[Enabled]
Hyper Threading Technology
[Enabled]
Intel(R) SpeedStep(tm) tech.
[Automatic]
Unlock locked CPU
and let it run at
lower multiplier
setting.
Modify Ratio Support [Disabled]
Allows you to enable or disable the Modify Ratio support. Configuration options:
[Disabled] [Enabled]
C1E Support [Enabled]
Allows you to enable or disable the CE support. In CE mode, the CPU power
consumption is lower than idle. Configuration options: [Disabled] [Enabled]
Max CPUID Value Limit [Disabled]
Enable this item to boot legacy operating systems that cannot support CPUs with
extended CPUID functions. Configuration options: [Disabled] [Enabled]
CPU TM function [Enabled]
Allows you to enable or disable the CPU internal thermal control function. In TM
mode, the CPU power consumption is reduced. Configuration options: [Disabled]
[Enabled]
Execute Disable Function [Enabled]
Allows you to Enable/disable Execute Disable Function.
Configuration options: [Disabled] [Enabled]
Hyper-Threading Technology [Enabled]
Allows you to enable or disable the processor Hyper-Threading Technology.
Configuration options: [Disabled] [Enabled]