Compaq ProLiant DL320 Ultra-Dense Server Deployment in Compaq Racks

Compaq ProLiant DL320 Ultra-Dense Server Deployment in Compaq Racks 44
13AS-0900A-WWEN
Input Power Budget Derating
This section explains how to derate the input power budget. The maximum rated power supply
input power is 200 W.
To derate the input power, start with the base configuration 0 from Table 21. Add the peak power
of the components included in the desired system configuration to calculate the derated power
budget. Typical and peak input powers for various components are listed in Table 22.
Example
Assume the desired server configuration is: 1×800 MHz, 2×128 MB, and 2×18.2 GB
Use Table 23 to calculate the derated power budget using the peak power from Tables 21
and 22.
Table 23. Example derating worksheet
Maximum Rated Input Power (in watts) for the base configuration Peak Power 51 W
1. Add the peak power for the processor. 26 W
2. Add the peak power for the memory. 3 W
3 W
3. Add the peak power for the HDD. 38 W
38 W
4. Add the peak power for the PCI card.
Peak power for the desired configuration (in watts) 159 W
5. Calculate the thermal dissipation.
× 3.41
Thermal dissipation for the desired configuration (in BTUs) 542 BTUs/hour
Therefore, the new power budget for this configuration is 159 W (compared to the rated 200 W),
and the thermal dissipation is approximately (159×3.41=) 542 BTUs/hour (compared to the rated
682 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 also be reduced.
Note: Compaq strongly recommends verifying that the derated power budget satisfies all the
installation requirements, including future upgrade plans.