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The standard defines how to signal the H-sync and V-sync pins in a standard SVGA monitor to trigger the monitor's power saving capabilities. DPMS defines four modes: normal, standby, suspended and off. When in the "off" state, some power may still be drawn in order to power indicator lights. The standard is:
The term is often used more loosely for any device that continuously must use a small amount of power even when not active; for example, a telephone answering machine must be available at all times to receive calls, and switching off to save energy is not an option. Timers, powered thermostats, and the like are other examples.
Power gating is a commonly used circuit technique to remove leakage by turning off the supply voltage of unused circuits. Power gating incurs energy overhead; therefore, unused circuits need to remain idle long enough to compensate this overheads. A novel micro-architectural technique [10] for run-time power-gating caches of GPUs saves leakage ...
So you might want to only turn off apps' background refresh if you don't use them often. The same is true for this next tip. Tip No. 2: Turn off location services. Weather apps, social apps and ...
Sleep mode has gone by various names, including Stand By, Suspend and Suspend to RAM.Machine state is held in RAM and, when placed in sleep mode, the computer cuts power to unneeded subsystems and places the RAM into a minimum power state, just sufficient to retain its data.
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