HP ProLiant SL170z HP ProLiant SL6000 Scalable System technology - Page 18

Power supply options Common slot power supplies come in multiple power ratings and have achieved efficiency ratings of up to 92 percent. Three power supply options are available for the SL6000 Scalable System: • 460W AC • 750W AC • 1200W AC up to 92% efficiency up to 92% efficiency up to 90% efficiency Common slot power supplies provide improved power delivery and the advantage of reclaiming lost power. With the exception of the 1200W power supply, they meet Climate Savers Gold requirements. The 1200W power supply meets Climate Savers Silver requirements. The power loading efficiency curve for the 750W power supply (Figure 14) provides an example of the high levels of power efficiency achieved by power supplies used in ProLiant G6 servers. Figure 14. Power/Efficiency curve for the 750 W HP power supply Oversized and lightly loaded power supplies do not run as efficiently as those that are heavily loaded. Therefore, HP recommends using the HP Power Advisor to identify the optimal power supply for each SL6000 configuration. With a choice of three power supplies of different wattage, customers can choose the power supply option that meets, but does not exceed their needs. The HP Power Advisor is available online at www.hp.com/go/hppoweradvisor. Redundant power operation The SL6000 Scalable System has four redundancy modes: User configurable, full AC or DC redundant, AC redundant with throttling, and no redundancy mode. The user configurable mode can be used to allocate power levels to each chassis, ensuring that total power is within the data center budget. The Power Management Controller monitors the chassis power and uses HP power capping technology to limit the AC input power. This feature is enabled as part of the LO100i Advanced Pack software license for the nodes. 18