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154 Using the System Setup Program
Power Management Settings
The system BIOS provides various options for power settings to help you save energy,
maximize system performance. The following table provides a guide for power
management settings.
Table 2-20. Power Management Settings
System Setup Menu Setting Maximum Performance
(48DB)
Energy Efficiency
(48DC)
Setup Page Setting Option D4
Token
Option D4
Token
Power
Management
Power Management Max.
Performance
021F Node
Manager
4800
Energy Efficiency Policy Performance 48D0 Low
Power
48D2
CPU
Configuration
Active Processor Cores All 026E 1/2 0233/
0232
Frequency Ratio Auto 48C0 3 48C3
QPI Frequency Auto 48C8 4.80GT/s 48C9
Turbo Mode Enabled 01E8 Disabled 01EA
C State Disabled 024C Enabled 024B
C1E State Disabled 02A2 Enabled 02A1
C6 State Disabled 480A Enabled 480B
C7 State Disabled 480E Enabled 480F
Direct Cache Access Enabled 48D4 Disabled 48D3
Hyper-Threading
Technology
Enabled 00D1 Disabled 00D2
Adjacent Cache Line
Prefetch
Enabled 0172 Disabled 0171
Hardware Prefetcher Enabled 0174 Disabled 0173
DCU Streamer
Prefetcher
Enabled 02C5 Disabled 02C6
DCU IP Prefetcher Enabled 02CE Disabled 02CF