High Efficiency Power Options
SGI's Eco-Logical™ servers and storage are designed to reduce power consumption and increase system-level efficiency and reliability. Leveraging low wattage components with high Mean Time Between Failure (MTBF) ratings — with careful focus on the power supply in a given system — is an important design criteria. Available with both high efficiency Alternating Current (AC) and Direct Current (DC) power supplies, SGI servers and storage systems feature a broad range of power distribution options compatible with any data center design:
AC-to-DC Power Rectification
In 2003, SGI launched the industry’s first AC-to-DC X86 rack-level rectification technology, enabling any standard Alternating Current (AC) data center to easily deploy Direct Current (DC)-based servers and storage with no changes to existing data center infrastructure. Given the inefficiencies most data centers face as a result of the complex AC-to-DC power conversion path required from the facility exterior to the systems themselves, a DC-based deployment can enable significant power savings and increase system availability without compromising density and performance.
How Does it Work?
In rectified DC implementations, one or more rectifier shelves provide up to 92% power efficiency and a Mean Time Between Failure (MTBF) rating exceeding 1 million hours, and offer flexible levels of circuit-level power redundancy at the rack level. Each rectifier is capable of delivering 2700 watts with two powered off a single 208 volt AC circuit.
Each server and storage system is equipped with a high efficiency -48VDC power supply instead of a standard AC power supply. SGI DC power supplies achieve efficiency levels of up to 96.5% and MTBF ratings exceeding 2 million hours—a significant reliability increase over traditional AC power supply technologies.
By handling the AC-to-DC conversion within the rack instead of within each system, data centers can successfully shift thermal load associated with the conversion to the rack level. This reduced heat output and the use of higher MTBF power supplies alone can significantly increase overall system reliability and availability.
Central Rectifier Cabinet Option for Row-Level Rectification