HP ProLiant DL380 Compaq ProLiant DL380 Generation 2 Server High-Density Deplo - Page 41

Compaq ProLiant DL380 Generation 2 Server High-Density Deployment in Compaq Racks 41 Compaq Confidential - Need to Know Required 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 1. Add the typical power for the processor. 2. Add the typical power for the memory. Typical Power 3. Add the typical power for the HDD. 4. Add the typical power for the PCI card. Typical power for the desired configuration (in watts) 5. Calculate the thermal dissipation. Thermal dissipation for the desired configuration (in BTUs) 226 W 27 W 2 W 2 W 10 W 10 W 278 W × 3.41 947 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. 14UH-0701A-WWEN