Processor P-States - Compaq BL10e - HP ProLiant - 512 MB RAM Introduction Manual

Figure 1. Power use in a typical server
Hard Drives
4%
PCI Slots
15%

Processor P-states

Processor performance states, or P-states, provide a quick and effective mechanism for adjusting
processor power consumption and performance. Both Intel
P-states to decrease processor power consumption by lowering the processor's core frequency and
voltage. Tables 1 and 2 list some of the P-states available with different processors.
Table 1. P-states of the Intel Xeon 5160 processor
P-state
P0
P1
P2
P3
Table 2. P-states of the AMD Opteron 2220 processor
P- state
P0
P1
P2
P3
P4
P5
P6
Typical Server Power Usage
Base Load
13%
Memory
28%
Core Frequency
3.0 GHz
2.66 GHz
2.33 GHz
2.0 GHz
Core Frequency
2.8 GHz
2.6 GHz
2.4 GHz
2.2 GHz
2.0 GHz
1.8 GHz
1.0 GHz
Processor
33%
Fans
7%
and AMD processors support using
® ®
4