Power, Thermal And Acoustics; Power Supplies; Figure 18. Power Supplies In M1000E - Dell PowerEdge M1000e Technical Manual

8 Power, thermal and acoustics

Lower overall system-level power draw is a result of Dell's breakthrough system design. The
PowerEdge M1000e chassis enclosure and blade servers maximize performance-per-watt through a
combination of power and cooling, energy efficient technologies, and tools. Additionally, the
PowerEdge modular blade servers have an extensive collection of sensors that automatically track
thermal activity, which helps regulate temperature thereby reducing server noise and power
consumption.
Built on Dell Energy Smart technology, the M1000e is one of the most power-efficient blade
solutions on the market. The M1000e enclosure takes advantage of Energy Smart thermal design
efficiencies, such as ultra-efficient power supplies and dynamic power-efficient fans with optimized
airflow design to efficiently cool the chassis and enable better performance in a lower power
envelope.
A modular system has many advantages over standard rack-mount servers in terms of power
optimization, and this aspect was a focal point throughout the M1000e's conceptualization and
development. The key areas of interest are power delivery and power management.
The M1000e provides industry-leading power efficiency and density, accomplished through highly
efficient components, improved design techniques, and a fresh air plenum that reduces the air
temperature to the power supply components. Lower operating temperature equates to higher
power density for the power supply (exceeding 21 watts per cubic inch) and higher power efficiency
(better than 87% at 20% load and higher at heavier loads, approaching 91% efficiency under normal
operating conditions).
Power efficiency in the M1000e does not stop with the power supply. Every aspect of efficiency has
been tweaked and improved from previous designs — adding more copper to PC board power
planes to reduce I2R losses, improving inductors and other components, and replacing some linear
voltage regulators with more efficient switching regulators.

Power supplies

The power distribution inside the M1000e modular server system consists of a power supply system
located in the back of the chassis as shown in Figure 18.

Figure 18. Power supplies in M1000e

PowerEdge M1000e Technical Guide
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