White Paper - Power Management in Intel Architecture Servers

Experimental Data and Analysis
We put an Intel® Xeon® processor 5500 series platform server to test by stressing the server CPU at different loads while manipulating different
NM policies and turning turbo mode on or off.
The data collected are shown in Figures 8 and 9. Server configuration was as follows:
CPU %
P0
P4
P7
Powers Watts
Power consumed with Node manager policy enabled and turbo mode disabled
135
130
125
120
115
110
105
100
20 30 40 50 60 70 80
Figure 8. Power variation with P-state change and CPU utilization, without turbo mode�
Processor/s Server Name Memory Power Supply Fans
1 B0 stepping Intel®
Xeon® processor
5500 series
SR1625UR 2-512MB DDR3 DIMMs Redundant power:
• Two PMBus enabled
power supply modules
which are manageable
• Power Distribution
Board (PDB)
Non-redundant cooling:
Ten xed chassis fans which
are not hot swappable
Table 1. Intel® Xeon® processor 5500 series platform server configuration
10
White Paper: Power Management in Intel® Architecture Servers