HP ML150 HP Power Capping and Dynamic Power Capping for ProLiant servers techn - Page 4

Figure 1. Power use in a typical server Typical Server Power Usage Base Load 13% Hard Drives 4% PCI Slots 15% Processor 33% Memory 28% Fans 7% Processor P-states Processor performance states, or P-states, provide a quick and effective mechanism for adjusting processor power consumption and performance. Both Intel® and AMD® processors support using 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 Core Frequency 3.0 GHz 2.66 GHz 2.33 GHz 2.0 GHz Table 2. P-states of the AMD Opteron 2220 processor P- state P0 P1 P2 P3 P4 P5 P6 Core Frequency 2.8 GHz 2.6 GHz 2.4 GHz 2.2 GHz 2.0 GHz 1.8 GHz 1.0 GHz 4