Dell PowerEdge M910 Technical Manual

Also see for PowerEdge M910: Manual Command reference guide Owner's manual Update Getting started guide

Contents

Dell PowerEdge M910 Technical Manual Manual pdf 19 page image

DellPowerEdge M910 Technical Guide 195.3 ThermalThe M910 thermal solution includes: Optimized airflow impedance for individual blade and chassis level airflow balancing Custom air baffling directs airflow through the components to maintain proper cooling Custom-designed heat sinks maintain CPU, IOH, and Intel 7500 chip temperatures withinthermal design targets Highly Optimized Fan Control Algorithm such as the following:o Base fan speeds are a function of hardware configuration and ambient temperatureto minimize airflow for a given environmento PID control algorithms are used for both CPU and DIMMs to maintain appropriatethermal margino Double refresh switching allows for DIMM temperature excursions up to 95°C whilemaintaining performance and thermal design targets as follows: The M910 thermal algorithm monitors the thermal sensor on each DIMM tomaintain DIMM temperatures below the typical 85°C specification in normaloperating conditions. Under extreme operating conditions, the thermal algorithm can switch theDIMMs into Double Refresh mode allowing an additional 10°C of thermalheadroom. In Double Refresh mode, DIMMs are allowed to operate as highas 95°C.5.4 Power EfficiencyOne of the main features of blade servers is enhanced power efficiency. The PowerEdge M910achieves higher power efficiency by implementing the following features:• User-configurable power options via the M1000e Chassis Management Controller (CMC)• Improved power budgeting• Voltage Regulator efficiency improvements• CPU VR dynamic phase shedding• Switching regulators instead of linear regulators• Closed loop thermal throttling• Use of DDR3 memory (lower voltage compared to DDR2)• Memory VR static phase shedding• BIOS Power/Performance options page• Active Power Controller (BIOS-based CPU P-state manager)• Ability to throttle memory• Ability to disable a CPU core• Ability to turn off embedded NICs or PCIe lanes when not being used• Energy Smart components at the M1000e chassis level to selectively enable more computingperformance with less power consumption