Technology brief HP Common Slot power supply technology 3rd edition Table of contents Abstract 2 Introduction 2 HP Common Slot power supplies 2 Load Balanced and High Efficiency Modes 7 Right-sizing the power supply Reducing hardware cost Avoiding trapped power capacity HP Power Advisor 8 8 8 8 HP Power Discovery Services 10 Installation considerations with HP Common Slot power supplies 10 Conclusion 11 For more information 11 Click here to verify the latest version of this document.
Abstract Energy directly consumed by data center equipment, the resulting heat produced and the energy that it takes to provide cooling can account for a majority of overall operating costs in today’s data centers, making it a top concern for IT and facilities managers worldwide.
Table 1: HP CS power supplies Name Input 80 PLUS Certification HP 460W CS Gold Power Supply 100-240 VAC Gold HP 460W CS Platinum Power Supply 100-240 VAC Platinum HP 460W CS Platinum Plus Power Supply 100-240 VAC Platinum HP 750W CS Gold Power Supply 100-240 VAC Gold HP 750W CS Platinum Power Supply 100-240 VAC Platinum HP 750W CS Platinum Plus Power Supply 100-240 VAC Platinum HP 750W CS -48VDC Power Supply -48VDC n/a 1 HP 1200W CS Silver Power Supply 100-240 VAC Silver HP 1200W
Figure 1: HP platforms that support HP Common Slot power supplies over several generations of products ProLiant DL300 G6/G7/Gen8 series & HP x3800 Network Storage ProLiant DL580 and DL585 G7 servers ProLiant DL100 G6 series & HP P4000 G2 SAN ProLiant DL785 and DL980 servers ProLiant ML300/100 G6 series (ML370, ML350, ML330, ML150) HP Common Slot power supply ProLiant DL1000 and DL2000 series ProLiant SL6000 and S6500 series ProLiant c3000 enclosure Integrity rx2800 i2 series The ability to use HP CS
Table 2: Operating efficiencies of 80 PLUS certified HP CS power supplies Percent of efficiency Power supply type @ 10% load @ 20% load @ 50% load @ 100% load HP 460W CS Gold 85.02% 90.39% 92.43% 91.57% HP 460W CS Platinum 86.50% 91.20% 94.37% 93.91% HP 460W CS Platinum Plus 88.58% 92.05% 94.42% 93.07% HP 750W CS Gold 87.58% 90.58% 92.90% 91.54% HP 750W CS Platinum 88.85% 92.04% 94.55% 93.67% HP 750W CS Platinum Plus 89.37% 92.47% 94.69% 93.41% HP 1200W CS Silver 78.
Figure 2B: Efficiency curves for HP CS Platinum power supplies 98.0% Peak efficiency range for 460W supply 96.0% Peak efficiency range for 750W supply Peak efficiency range for 1200W supply Efficiency 94.0% 92.0% 90.0% 88.0% 86.0% 0 400 200 460W Platinum 600 Power 750W Platinum 800 1000 1200 1200W Platinum Figure 2C: Efficiency curves for HP CS 460W Gold, 750W Gold and 1200W Silver power supplies 98.0% Peak efficiency range for 460W supply 96.
Load Balanced and High Efficiency Modes An HP ProLiant server configured with the HP 460-watt, 750-watt, or 1200-watt CS power supply supports the following three scenarios: A: Operating with a single supply B: Operating with redundant supplies in Load Balanced Mode C: Operating with redundant supplies in High Efficiency Mode Figure 3 compares the efficiency of the HP 750-W CS Platinum Plus power supply under these three scenarios.
Right-sizing the power supply The availability of HP CS power supplies in multiple capacities allows IT technicians to match the power supply capacity to the actual load of a server configuration; that is, to select the right-size power supply. In addition to increased efficiency, right-sizing the power supply also offers two immediate benefits: reducing hardware cost and avoiding trapped power capacity. Reducing hardware cost Smaller capacity supplies cost less to purchase than larger capacity supplies.
Figure 4A: Configuration display with redundancy reminder message Figure 4B: Configuration display showing message when power supply capacities have been exceeded The HP Power Advisor allows IT architects to choose the right size power supply for a given server configuration. This saves money in the initial acquisition by allowing the purchase of less expensive, smaller-capacity supplies. This efficient operation results in additional energy savings.
HP Power Discovery Services As a feature of Automated Energy Optimization, HP Power Discovery Services (PDS), formerly HP Intelligent Power Discovery is the first technology to create an automated, energy-aware network between IT systems and facilities. HP PDS allows users to reclaim millions of dollars in wasted power capacity and downtime across data centers.
HP ProLiant servers that support redundant power supplies only allow installation of same-type supplies. A power supply mismatch or an unsupported power supply will result in an error indication as described in Table 4. Table 4: HP CS power supply compatibility with HP PDS Condition System insight display indication Description Power supply mismatch detected during boot Power supply LED (all supplies) blinking amber BIOS ROM will power up power supply #1 and then halt.
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