Compaq ProLiant DL380 Generation 2 Server High-Density Deployment in Compaq Racks

Compaq ProLiant DL380 Generation 2 Server High-Density Deployment in Compaq Racks 41
Compaq Confidential - Need to Know Required
14UH-0701A-WWEN
Input Power Budget Derating
This section explains how to derate the input power budget. The maximum rated power supply
input power is 575 W.
To derate the input power, start with the minimum configuration 0 from Table 18. Add the typical
power of the components included in the desired system configuration to calculate the derated
power budget. Typical input powers for various components are listed in Table 19.
Example
Assume the desired server configuration is: 2 × 1.13 GHz, 4 × 128 MB, and 2 × 18.2 GB.
Use Table 20 to calculate the derated power budget using the typical power from Tables 18 and
19.
Table 20. Example Derating Worksheet
Maximum Rated Input Power (in watts) for the base configuration Typical Power 226 W
1. Add the typical power for the processor. 27 W
2. Add the typical power for the memory. 2 W
2 W
3. Add the typical power for the HDD. 10 W
10 W
4. Add the typical power for the PCI card.
Typical power for the desired configuration (in watts) 278 W
5. Calculate the thermal dissipation.
× 3.41
Thermal dissipation for the desired configuration (in BTUs) 947 BTUs/hour
Therefore, the new power budget for this configuration is 278 W (compared to the rated 575 W),
and the thermal dissipation is approximately 947 BTUs/hour (compared to the rated 1961
BTUs/hour).
This derated input power budget significantly reduces the power and thermal requirements for
highly populated racks, which reduces the number of PDUs for certain configurations. Fewer
PDUs increases deployment time and lowers costs. Costs for the facility electrical plumbing, data
center floor ventilation, and facility air conditioning installation can be reduced.
IMPORTANT: Compaq strongly recommends verifying that the derated power budget satisfies
all the installation requirements, including future upgrade plans.