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Topic: Power consumption

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	Power Consumption
		Once the actual power consumption is known though, it is a simple task to convert to either of the others.
		Power consumption can be derived both for individual appliances and for the household as a whole.
		By taking regularly readings of the accumulated kWh and having some idea of when high consumption appliances like heaters, stoves and air-conditioners were operating, it should be possible to work out where a lot of the electricity consumed is going.
	users.tpg.com.au /users/robkemp/Power/PowerConsumption.htm (359 words)

	Power consumption - Wikipedia, the free encyclopedia
		In electrical engineering, power consumption refers to the electrical energy over time that must be supplied to an electrical appliance to maintain its operation.
		The power consumption is usually a result of power used to perform the intended function of the device plus additional "wasted" power that is dissipated as heat and/or light.
		Power consumption is usually measured in units of watts.
	en.wikipedia.org /wiki/Power_consumption (121 words)

	Electric appliance capable of saving power consumption - Patent 6636026
		Although power to operate a built-in clock is included in the standby power consumption in addition to that of said parts, the most part is occupied by that of said parts.
		Furthermore, since the power supply to each part of the clock section is stopped so far as the reservation function of the electric appliance is not interfered and the time adjustment is automatically made whenever it is required, the second power consumption is saved without sacrificing the function and operability of an electric appliance.
		Furthermore, since the power supply to each part of the clock section is stopped so far as the reservation function of an electric appliance is not interfered and the time adjustment is automatically made whenever it is required, the standby power consumption is saved without sacrificing the function and operability of an electric appliance.
	www.freepatentsonline.com /6636026.html?highlight=teletext (6994 words)

	X-bit labs - Print version
		During extreme overclocking, the power consumption of the graphics card grew up by 48.9% in the Idle mode and by 66.9% in the Burn mode (the GPU frequency growth was 32.6%, the memory frequency growth was 31.1%).
		At overclocking, the power consumption grew by 11.1% in the Idle mode and by 6.8% in the Burn mode (the GPU and memory clock rates grew by 20% and 25%, respectively).
		The frequencies of the GPU and the graphics memory grew by 12.5% and 26.7% at overclocking, and the power consumption increased by 5.9% and 7.4% in the Idle and Burn modes, respectively.
	www.xbitlabs.com /articles/video/print/ati-powercons.html (3395 words)

	The IBM PowerPC 970FX power envelope and power management
		Figure 1 shows the total power of the processor and these three major components as a function of line center, where line center is the dimension of the transistor's gate.
		At 1.3 V and 2.5 GHz, the power consumption is reduced from 100 W to less than 40 W in nap mode and less than 30 W in deep nap mode.
		The power envelope of the 970FX microprocessor shows the broad range of power and frequency that can be obtained with the use of dynamic frequency and voltage scaling for both maximum and nap power modes.
	www.ibm.com /developerworks/library/pa-powerenv (1497 words)

	Chip designers voyage to voltage island \| CNET News.com
		If by chance a group of chip designers were left alone in a room, their conversation would most likely turn to power consumption.
		Ultimately, "power consumption will probably become the limiter...because as we put more and more transistors per unit area, if we don't keep the power density flat, we can't use the chip," said Bijan Davari, vice president of semiconductor development at IBM Microelectronics.
		Power "is going to be a hot topic as far as you can see," Zieber said.
	news.com.com /2100-1001-934355.html (910 words)

	Power Consumption
		Once the actual power consumption is known though, it is a simple task to convert to either of the others.
		Power consumption can be derived both for individual appliances and for the household as a whole.
		By taking regularly readings of the accumulated kWh and having some idea of when high consumption appliances like heaters, stoves and air-conditioners were operating, it should be possible to work out where a lot of the electricity consumed is going.
	www4.tpgi.com.au /users/robkemp/Power/PowerConsumption.htm (359 words)

	Semiconductor strategies for low power consumption
		Another important feature in power control is for the microcontroller to have various operating modes that enable you to either manually or automatically shut down modules not in use.
		Implementing power modes enables the software programmer to switch to low power consumption or standby power without taking care of each and every module individually, although there is certainly still the option to do so.
		The current consumption of a CMOS transistor circuit, regardless of the technology, is much larger in the active, switching state.
	www.us.design-reuse.com /articles/article8978.html (1436 words)

	Embedded.com - Optimizing power consumption in embedded DSP designs (Site not responding. Last check: 2007-10-15)
		Although useful for gross estimates, these methods are not acceptable for estimating the power consumed by a DSP in a complex system where the cores, peripherals and on-chip memory may be turned on and off independently according to changes in the applications and operating modes.
		Once maximum and idle power figures are established for each of the on-chip functions, it is possible to create a power consumption curve for each by interpolation.
		In handheld systems, low power consumption is usually a major requirement in order to extend battery operating time, but even line-powered systems need to keep heat dissipation and operating costs down by drawing less current.
	www.embedded.com /rss/showArticle.jhtml?articleID=187002435 (2406 words)

	Power Consumption
		Note that unlike most hard disk specifications, power consumption normally is higher for drives with more platters even within the same family--since they have more mass to move, more power is required to turn the platters.
		This tells you that roughly 3/4 of the +12 V power is taken by the spindle motor and roughly 1/4 by the actuator assembly.
		Power consumption is primarily affected by the design of the drive's spindle motor and the number and size of the spindle platters, and to a lesser extent, other components such as the actuator and controller board.
	www.storagereview.com /guide2000/ref/hdd/perf/perf/spec/otherPower.html (441 words)

	PC Power Consumption (Site not responding. Last check: 2007-10-15)
		When power-saver mode kicks in (and the monitor goes fl with a yellow indicator light) the power consumption is negligible to the point that our test equipment did not even register any power use.
		The total power consumption of a typical PC and monitor does not consume more than 175 Watts of energy at its highest rate.
		If you power it off you will still receive virus definitions when the PC comes up, but you will have missed the scanning window and have to wait until the next scheduled scan.
	windows.uwaterloo.ca /Hardware/PC_Power_Consumption.asp (695 words)

	Power Integrations
		Even though the remote control receiver consumes very little power (approximately 0.1 W), power supplies that use inefficient technology such as linears, are not smart enough to reduce consumption during the standby state and end up wasting several watts of power.
		No-load power is the energy used by a device when it is disconnected from it's load and performing no function.
		Linear power supplies, also referred to as “energy vampires” because of their energy-sucking nature, work off of old technology from the 1800’s, which hasn’t kept pace with current innovation.
	www.powerint.com /greenroom/faqs.htm (1137 words)

	Embedded.com - Software Matters for Power Consumption (Site not responding. Last check: 2007-10-15)
		This advance in power management is based on the following observation: the energy consumed by a processor is directly proportional to the clock frequency driving it and to the square of the voltage applied to its core.
		Minimizing sleep mode power consumption can be the difference between a device that has to have its batteries recharged every day and one that can go weeks between recharges.
		Minimizing sleep mode power consumption requires analyzing the hardware in your system and determining how to set it into the lowest-possible power state.
	www.embedded.com /story/OEG20030121S0057 (2634 words)

	Power consumption compared (Site not responding. Last check: 2007-10-15)
		So, I just made a bold assumption that perhaps all the different K8 chips based on the same core consume roughly equal amounts of power assuming the fequency and I adjusted the Sempron 3100+ voltage to be equal to the ones used on actual A64 chips to extrapolate the consumption on those.
		The problem seems to have been that most mobos were designed so that their CPU power regulator was fed from +5V PSU and most PSU-s and mobos couldn’t take the wild power consumption changes happening on this +5V rail (check out the max power consumption of a Palomino and see the huge difference).
		I have not measured this, it is mighty difficult to measure it without doing some serious excercises on a mobo using a soldering iron, because this power is drawn from a +3.3V rail among with all the other chips present on the motherboard.
	www.goodwin.ee /sulo/Power2.htm (2010 words)

	TechReviewer.com :: The Power Consumption of Modern Computers
		To measure the actual power used by the test systems, the power flowing into them needs to be metered.
		The fl wire is the wire that power flows in on, at 120 AC volts.
		The power use is listed in watts, at 120 volts AC, so this data does not reflect how much actual load was placed on the power supply.
	www.techreviewer.com /viewpage.cfm/pi/29 (470 words)

	Apple Laptop Power Consumption Tests
		The normal power consumption tests were done in several states selected to produce the most, least or typical power consumption.
		Also, as the battery continues to charge, the total power consumption seems to be constant through the first part of the charage cycle.
		The actual power was nearly constant as the current was increasing to compensate for the decrease in battery voltage.
	www.girr.org /mac_stuff/laptop_power.html (1619 words)

	The Tech Report - Power consumption and Vista's Aero interface
		To determine whether running Vista's Aero interface increases a system's power consumption, I grabbed a copy of the latest public release candidate, x64 build 5728, and a stack of graphics cards that included a Radeon X1900 XTX and X1800 GTO, and a GeForce 7900 GTX, 7900 GT, and 7600 GT.
		This system was plugged into a Watts Up watt meter that measures system power consumption, sans monitor and speakers, at the wall outlet.
		Power consumption did spike by between 10 and 15W when using Aero's 3D window switching feature, though.
	techreport.com /onearticle.x/10945 (679 words)

	Powerlet :: Heated Vest Primer
		The alternator is responsible for producing the power to keep the battery charged and power all of the electrical loads.
		To conserve power, many bikes automatically turn off the low beam when the high beam is turned on.
		To find the total power required for all of the accessories you plan to use, add the power rating (watts) for each device.
	www.powerletproducts.com /documentation/excesscapacity.html (861 words)

	Laptop Battery Power Ratings and Power Consumption 101
		Every laptop battery is given a power rating in order to show you, the consumer, about how long your battery should last before it needs to be recharged.
		A volt (V) is a measurement used for the amount of pressure the positive and negative electrodes produce in a battery during the process of discharging energy.
		This pressure, or power, is similar to the volts a battery uses.
	www.priorityelectronics.com /batteries-powerratings.htm (601 words)

	Coding Horror: Video Card Power Consumption
		The issue is not the power consumption, it's that most of this power is immediatly transformed into thermal power that you have to dissipate (unless you want your computer to overheat and either throttle or crash).
		Of course power consumption doesn't help either, the more power your computer needs the better your PSU has to be (both performance and quality-wise).
		Power supply makers are being briefed now in order to make sure that the power supplies they are shipping by the end of this year are up to par with the high end GPU requirements for late 2006/early 2007.
	www.codinghorror.com /blog/archives/000662.html (2312 words)

	Power Management DesignLine \|Ensuring efficient DSP power management (Site not responding. Last check: 2007-10-15)
		Although performance requirements tend to dominate in the first group, there are power constraints that cannot be ignored.
		Standby modes need to conserve power during waiting periods, while active modes may benefit from the use of different types of processing elements.
		One of the biggest power drains, as well as one of the biggest sources of delay, lies in off-chip accesses.
	www.powermanagementdesignline.com /170101603 (1079 words)

	Orders of magnitude (power) - Wikipedia, the free encyclopedia
		Few things can sustain the transfer or consumption of energy on this scale; some of these events or entities include: lightning strikes, naval craft (such as aircraft carriers and submarines), engineering hardware, and some scientific research equipment (such as the supercollider and large lasers).
		Modern high-powered diesel-electric railroad locomotives typically have a peak power output of 3–5 MW, whereas a typical modern nuclear power plant produces on the order of 500–2000 MW peak output.
		W - Phys: The Planck power, the basic unit of power in the Planck units.
	en.wikipedia.org /wiki/Orders_of_magnitude_(power) (1252 words)

	Calculating Power Consumption (Site not responding. Last check: 2007-10-15)
		The power consumption table we have provided for you is analysis of energy usage for a representative small
		Making up a chart, such as this, will allow you to understand where your power is going and may give you ideas of how to reduce your loads in the most effective manner.
		It is important that you are comfortable and knowledgeable with the day to day maintenance and operation requirements of your equipment, and that you rely upon yourself to ask us questions if there is something that you do not understand.
	www.solarcraft.net /faq/power_consumption.html (403 words)

	GRC \| Palm Tungsten Power Consumption Research (Site not responding. Last check: 2007-10-15)
		But since I have absolutely determined that they do not reduce the Palm's power consumption by even the slightest amount, they are just "booby traps" in the purest sense of the word, and the PXAClocker utility is FAR more dangerous to use than it should be or needs to be.
		One coincidental fact is that the range of power consumption from minimum to maximum processor clock speed is almost exactly the same as for minimum to maximum display backlight brightness.
		And, again, the power consumption due to processor speed is independent of any due to display brightness.
	www.grc.com /pda/PalmPower.htm (2009 words)

	Power Consumption Table - ABS Alaskan Alternative Energy (Site not responding. Last check: 2007-10-15)
		Power Consumption Table - ABS Alaskan Alternative Energy
		The actual power consumption of your household appliances may vary significantly from the figures in this chart.
		Before you do a final load* calculation for your household, we strongly recommend checking the tags and owners manuals for your appliances to get precise figures.
	www.absak.com /design/powercon.html (161 words)

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		When we were struggling to reduce the power consumption, there was a point in time when we simulated how power consumption would change in existing devices if we applied cutting-edge semiconductor technology to them.
		In the case of the GameCube, we discovered that the power consumption could be reduced to between one-third and one-quarter of the consumption of the GameCube's semiconductors.
		Anyone can realise “low performance with low power.” Others tend to aim for “high performance with high power.” With Wii however, Nintendo alone has pursued “high performance with low power consumption.” So, while Wii embraces cutting-edge technology and high performance, the direction it is aiming in is completely different from that of previous systems.
	wii.nintendo.com /iwataasks.jsp (1863 words)

	Bluetooth and power consumption: issues and answers (Site not responding. Last check: 2007-10-15)
		It will be important to have accurate current consumption estimates for these devices so that the description on the box lives up to the consumer's expectations.
		On closer inspection of these equations, it is obvious that for both chips, two of the modes dominate nearly 90% of the total current used in the system (10 ms sniff and page scanning), while two of the modes use nearly none.
		This method for measurement of average current consumption is a useful tool to select a chipset or module and helps the engineer to understand a product early in the development phase.
	rfdesign.com /mag/radio_bluetooth_power_consumption/index.html (2516 words)

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