ProLiant DL360 G2 Server High-Density Deployment

ProLiant DL360 G2 Server High-Density Deployment 11
The power budgets of optional components referred to (in the following sections) were derived
from the system input power of a set of selectively measured server configurations. The
configurations measured range from a basic low-end configuration to a fully populated high-end
configuration. Since the input power values for a ProLiant DL360 G2 server in an installation
might vary depending on the software applications, the information provided in this section
should be used as a guideline only.
The ProLiant DL360 G2 server power supply is designed to support future upgrades of
processors, DIMMs, and hard disk drives. As such, the power supply output power is rated at
200 W. Considering the power supply efficiency of 65% (including the Power Factor Correction);
the power supply input power is rated at 308 W. This input power value may be used in planning
for the power source implementation and facility cooling requirements. In some cases the input
power requirement for each ProLiant DL360 G2 server might be desired to be lower than 308 W.
For example,
• To minimize the number of PDUs, that is, the number of facility power feed lines, required
for each rack.
• To match the rack current requirements with the existing facility branch circuit breakers.
• To match the rack power and cooling requirements with the existing facility power and
cooling limitations.
Table 5 demonstrates how significant reduction in input current and thermal dissipation can be
realized, if a deployment plan can limit each ProLiant DL360 G2 configuration over the useful
lifetime of a rack configuration.
Table 5. De-rated Current and Thermal Dissipation for Reduced Input Power Assumptions
De-Rated Fully Rated
Input Power 120 W 250 W 308 W
Input Current @110 V AC 1.09 A 2.27 A 2.80 A
Input Current @208 V AC 0.57 A 1.20 A 1.48 A
Thermal Dissipation 409 BTUs/hour 852 BTUs/hour 1050 BTUs/hour
The de-rated input power values of 120 W and 250 W can be correlated with the measured input
power values for the minimum and maximum configurations for ProLiant DL360 G2 servers.
However, the de-rated input power value must be high enough to account for any future upgrades
for a deployment plan.
As stated earlier, the power supply is designed to support future processor and hard drive
upgrades. When installing 42 servers, the number of PDUs to be installed will depend on the
support for the input current requirement. Carefully de-rating the input power may very well
satisfy deployment needs and also reduce the number of PDUs per rack. Reducing the number of
PDUs has a direct impact on the deployment time and maintenance of an installation.
Input Current and Thermal Dissipation Calculations
The input power is the key in deriving the input current and thermal dissipation. For a given input
power, the input current will vary depending on the input voltage level.
1713-0702A-WWEN