IBM x3650 M3 Product Manual page 4

Energy efficiency
The System x3650 M3 has an energy-efficient design with features including the following:
Low-voltage processors draw less energy and produce less waste heat than high-voltage processors,
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thus helping to reduce data center energy costs. Available 4-core Xeon 5600 series processors use
only 40 W and 6-core processors consume as little as 60 W.
Optional solid-state drives (SSDs) use only 2 W of power per drive, compared to 9 - 10 W for 2.5-inch
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HDDs. This is as much as 80% less power than a 2.5-inch HDD would use, with a corresponding
reduction in heat output that further improves the overall bottom line.
Support for 1.35 V low-voltage DDR3 memory DIMMs that consume 20% less energy.
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Energy-efficient components, including low-voltage transistors and voltage regulator modules, and
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power supplies that are up to 90% efficient.
The x3650 M3 uses hexagonal ventilation holes in the chassis. Hexagonal holes can be grouped
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more densely than round holes, providing more efficient airflow through the system chassis. This
ultimately results in reduced operational costs.
An altimeter works in conjunction with the IMM to govern fan rotation based on the readings that it
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delivers. This saves money under normal conditions because the fans do not have to spin at high
speed.
IBM System x3650 M3 4