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| Â | CPUs Ranked by Noise / Heat :: SilentPCReview.com |
 | | Extremely small with vanishingly low power consumption, some of these integrated platforms are designed to be run fanless for a variety of applications. | | | Although fanless CPU cooling is a kind of Holy Grail for many enthusiasts, it is, by itself, not enough to make a computer silent. | | | The standard air-cooling method is by conduction from the CPU to a heatsink, then by convection into the air within the case, and finally evacuation of the hot air via PSU and/or case fans. |
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http://www.silentpcreview.com/article31-page1.html
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| Â | Citations: Advanced Configuration and Power Interface Specification - Microsoft (ResearchIndex) |
| | For savings in power consumption to be made, applications should attempt to keep the hardware resources in an idle state for as long as possible so that the time spent in low power mode is maximised. | | | The change in power state is also detected with the digital multimeter that measures current consumption of the hard disk. | | | The strategy is based on a standardization initiative known as the Advanced Configuration and Power Interface (ACPI) ACPI specifies an abstract and.... |
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http://citeseer.ist.psu.edu/context/933990/0
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| Â | Benchtest.Com - CPU Cooler Programs Intro |
| | The HLT instructions offer the benefit of less power consumption when the CPU is idle and no benefit when the CPU is actively processing. | | | However, many tasks do not require the CPU to be computing constantly and this is when these programs go to work. | | | What I have found is that while all of the programs help to keep the CPU from running as warm, some of the versions of CPUIdle don't seem to be very effective in keeping the processor cool during file transfers. |
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http://www.benchtest.com/cooler.html
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| Â | Advanced Power Management States |
| | The Suspended state is a computer state which is defined to be the lowest level of power consumption available that preserves operational data and parameters. | | | The APM definition of Ready only indicates that your computer or device is fully powered on, it does not differentiate between active and idle conditions. | | | The suspended state is a special low power condition that applies to your computer as a whole, and not the individual components. |
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http://www.mcsc.k12.in.us/techdept/kbase/197739.htm
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| Â | Get as Much Work Done on the Road as You Can in the Office |
| | Support for version 2.0 of the Advanced Configuration and Power Interface (ACPI) specification improves hardware and operating system coordination, allowing Windows XP Professional to monitor the CPU activity and reduce unnecessary power consumption. | | | When you stop working, Standby gradually reduces power to parts of your system that are not in use—the hard drive, the monitor, and so on—saving power while keeping your computer available for you to start working again almost instantly. | | | Hibernate saves your desktop state with all open files and documents as you left them, and then it powers down your computer. |
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http://www.microsoft.com/windowsxp/evaluation/features/mobility.mspx
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| Â | A Look at Power Consumption and Performance on the 3Com Palm Pilot |
| | The large difference in power consumption between the memory-intensive and CPU-intensive operations must indicate that the CPU is able to conserve some energy when it is waiting for data to arrive on the memory bus. | | | On the Pilot Pro, the power consumption of the CPULoop is significantly higher than the power consumption of the memory-intensive benchmarks, whereas on the Pilot 1000 this is not the case. | | | Predictably, the power consumption of the CPU is greater for each of the run mode operations. |
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http://guir.cs.berkeley.edu/projects/p6/finalpaper.html
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| Â | Freescale gets back in the game - OSNews.com |
| | Freescale could have increased performance by upping the clock speed but in doing so it would would have sent the power consumption rocketing to PC CPU levels, something unacceptable in their primary market. | | | Freescale (previously Motorola Semiconductor) have concentrated on the embedded market where low power consumption rules rather than absolute maximum performance, thus the clock speed has not soared like the Pentium 4 but then neither has pipeline length or the power consumption. | | | That alone would have brought Freescale back into the reckoning but they didn't stop there, they have added a slew of on board peripherals not only reducing costs but increasing overall system performance whilst simultaneously reducing power consumption. |
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http://osnews.com/story.php?news_id=8548
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| Â | B-right OS |
| | The merits of this CPU are that it has an extremely small power consumption of 10mW per MIPS, and that it also possesses a low electrical power consumption mode that operates with a clock of 32KHz, and thus it was judged that it is suitable for mobile use, such as a PDA. | | | In order to decrease electrical power consumption as much as possible during operation with the micro-BTRON-specification OS "B-right," we created a function that puts to use the low power consumption mode that is supported in the hardware. | | | At present, we are in the process of fine tuning and evaluating electrical power consumption and battery duration time, and although the final figures have not appeared, we are aiming at a battery duration time of 40 to 60 hours. |
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http://tronweb.super-nova.co.jp/microbtron.html
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| Â | MacSlash TiBook Power Consumption |
| | In OS 9, processor cycling was an option which slept the CPU if there was no keyboard/mouse input, but with OS X, power consumption scales relative to how idle the machine is (check CPU monitor). | | | I've found it helps conserve battery life if you dim the screen (the screen uses up to 2/3 of the power consumption) and turn off the Airport when you are not connected to a wireless network. | | | Putting the computer to sleep is in most cases better than shutting down since rebooting the machine requires a ton of power from hard drive usage. |
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http://macslash.org/articles/02/08/07/2121257.shtml
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| Â | Re: Do 100% processors consume more power? |
| | They are talking about CPU cycles, not electrical power consumption. | | | Compared to how many watts the rest of the system's pulling the difference in power consumption between an 'idling' CPU and a fully loaded one isn't that great. | | | Note that the power increase for the CPU from idle to 100% utilisation is a fraction of the overall PC power load. |
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http://www.thehelparchive.com/new-1639274-293.html
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| Â | Power Consumption |
| | It may be worth noting that the CPU and memory, not disk, account for nearly all of the difference between idle and active power consumption levels in the newer computers. | | | Appliances such as computers, whose consumption of power varies widely and can be reduced with energy-conscious configuration, give you hardly any clue about how much power they consume at any point in time. | | | While I originally thought that disk activity had a major influence on power consumption, the effect is barely noticable. |
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http://www.oak.homeunix.org/~marcel/sdf/stuff/power.php
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| Â | Chiplist: Cyrix 6x86 CPU |
| | Cyrix 6x86 CPU: 3.3 V (C016) or 3.52 V (C028) core, or voltage switching supporting both, 5 V tolerant I/O, from revision 2.7 less power consumption. | | | Cyrix 6x86L CPU (low power): 2.8 V core, 3.3 V I/O. Cyrix 6x86L-PR120+ CPU). | | | In general practice, even faster than Intel's Pentium Pro CPUs (Cyrix optimized for 16 bit code, Intel optimized the Pentium and Pentium Pro CPUs for 32 bit code). |
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http://www.microprocessor.sscc.ru/chiplist/cl.2.50.html
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| Â | WH: Power Consumption, a detailed look |
| | My current config is: pcm-4822 (16mb, 486dx4100) pcmcia card (intend to use with webgear aviator2.4 wlan card) vga / pc104 carrier / POST monitor (external desktop monitor for now) If I let the system idle for 8 seconds, it pushes the cpu into "idle" mode and power consumption drops by 2 watts or so. | | | Okay, so I've got the advantech pcm-4822 with a 486dx4-100, and the power consumption is really weird on it. | | | if I hold the backspace key down (key repeat, beeping noises), the power consumption DROPS, at least according to my meter. |
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http://wearables.blu.org/wear-hard-00/20001533.html
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| Â | CPU electrical consumption - Wikipedia, the free encyclopedia |
| | Processor manufacturers usually release two power consumption numbers for a CPU, the typical thermal power, which is measured under normal load, and the maximum thermal power, which is measured under a worst-case set of instructions. | | | One such CPU, the Intel XScale, can run at 600 MHz with only half a watt of power, whereas x86 PC processors from Intel in the same performance bracket consume roughly eighty times as much energy. | | | The steady trend in CPU power supplies over the past decade has been towards using lower voltages and having considerably higher currents. |
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http://en.wikipedia.org/wiki/CPU_electrical_consumption
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| Â | Inside the Labs - CNET reviews |
| | And another way that Banias will reduce power consumption is with aggressive clock gating, which applies power to only those gates in the CPU that need it at any given moment. | | | MacDonald claims that, with Banias, "frequency is actually a secondary consideration." The Banias CPU will feature a new technique for handling instructions and code, called micro ops fusion, which combines instructions for faster execution instead of using raw speed to push instructions through quickly, resulting in a more efficient CPU that consumes less power. | | | The Banias CPU is not meant to be a one-size-fits-all approach, so the typical design considerations for larger form factors running at faster frequencies--such as servers and high-end desktops--need not be factored into the core CPU design. |
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http://reviews.cnet.com/4520-6603_7-5021222-1.html?legacy=cnet
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| Â | NEC Unveils Industry's First Mobile Phone Application Processor with Parallel Processing Capabilities |
| | The MP211 application processor solves this dilemma by simultaneously providing higher performance and lower power consumption, and will be an integral part of NEC Electronics' lineup of solutions for the mobile phone space. | | | "Parallel processing technology is a key to enabling enhancement of future applications, especially those that require both high performance and low power consumption," stated Yoshiharu Tamura, General Manager, Mobile Terminal Unit, NEC Corporation. | | | The new product leverages NEC Electronics' parallel processing and low power consumption technologies, enabling high performance multimedia processing such as terrestrial digital broadcast reception, videophone, and music playback while maintaining low power consumption. |
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http://www.physorg.com/news1344.html
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| Â | Power consumption compared |
| | 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 couldnÂ’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). | | | 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. | | | 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. |
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http://www.goodwin.ee/sulo/Power2.htm
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| Â | In Hot Pursuit of Energy Efficiency |
| | Although supplying power to server racks has its problems, McDunn said he has seen an enormous drop in "environmentals"—the combined costs of the equipment's electrical consumption and cooling—as old power-hogging mainframes were replaced with more efficient models or with Intel-based servers. | | | It does this by offloading the prioritization and ordering of instructions to software, thus greatly reducing the number of transistors, and by throttling back power consumption when maximum processing power is not required. | | | And since it takes 0.6 watts of air conditioning to remove the heat produced by every 1 watt of computing power, the total electricity demand per CPU has jumped by a multiple of more than 120 since 1985. |
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http://www.eweek.com/article2/0,4149,1502190,00.asp
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| Â | [H] Enthusiast - [H]arder than ever. |
| | If that were not enough, AMD has done some very slick things with Athlon 64 X2 power consumption, much as we have seen them do with their low power "mobile" processors. | | | The power consumption is low enough for the dual core technology that no heatsink updates are needed, so most Athlon 64 thermal solutions currently on the market will fare just fine. | | | Also, each CPU core has its own 1MB of full speed L2 cache and the L1 caches are of course independent as well. |
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http://www.hardocp.com/article.html?art=NzY2
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| Â | Upcoming Intel Mobile CPU Power Consumption Rising - Neoseeker News Article |
| | The Jonah CPU core will be available as three flavors, the Jonah-NV, LV, and ULV just like the Dothan. On top of that it is also geared for the Pentium M family. Power consumption figures are known only for the NV at this point, and that's 45W. | | | Japanese technology news wire Impress PC Watch has additional information regarding power consumption for upcoming Intel CPUs for the mobile computing market. | | | Meanwhile, the Dothan-NV, LV, and ULV CPU releases for second and third quarter will consume 21W, 10W, and 5W of power respectively. The Dothan-NV and LV releases for the fourth quarter will see an increase in power requirement, respectively 30W and 10W+. |
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http://www.neoseeker.com/news/story/3081/
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| Â | Embedded Intel Architecture - Intel® 486™ DX Processors |
| | If the input clock is stopped, the CPU is in the Stop Clock state, lowering power consumption to the 300-1000 micro-amp range. | | | One of the SL Technology features used to manage the power consumption of the CPU is Stop Clock. | | | While in the Stop Grant state, the CPU external clock frequency can be changed, either to operate at a different frequency or stop the input clock. |
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http://www.intel.com/design/intarch/prodbref/272712.htm
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| Â | CPUHeat & CPUMSR projects homepage |
| | TDP is a power consumption of a processor while executing normal software. | | | This is because in real world there can be application that forces Intel processor to drain more power than TDP, therefore forcing CPU to slow down. | | | For more than four years Intel hide real power consumption by a number called TDP - Thermal Design Power. |
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http://www.cpuheat.wz.cz/html/IntelPowerConsumption.htm
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| Â | New Intel Mobile Processor Delivers Best Performance And Minimal Power Consumption For Sub 3-Pound Notebooks |
| | When running in Battery Optimized Mode, the processor runs at a lower frequency and lower voltage, significantly lowering CPU power consumption while still delivering high performance. | | | The Low Voltage mobile Pentium&; III processor 700 MHz featuring Intel&; SpeedStep™ technology delivers the best performance, lowest power consumption and extended battery life to new categories of mini-notebooks weighing less than 3 pounds. | | | By designing industry-leading mobile processors for every type of mobile PC, Intel enables manufacturers to design systems that offer the best performance, low power consumption and extended battery life for all mobile PC segments. |
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http://www.intel.com/pressroom/archive/releases/20010227comp.htm
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| Â | Power Consumption |
| | It may be worth noting that the CPU and memory, not disk, account for nearly all of the difference between idle and active power consumption levels in the newer computers. | | | Appliances such as computers, whose consumption of power varies widely and can be reduced with energy-conscious configuration, give you hardly any clue about how much power they consume at any point in time. | | | With these strategies, a desktop can easily attain an idle power consumption of 60 Watts, or 35 Watts if one can remember to turn off the monitor when getting up, and a laptop can attain 13 Watts. |
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http://www.oak.homeunix.org/~marcel/sdf/stuff/power.php
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| Â | CPU Planet |
| | Since its debut in 2000, Transmeta Corp. has always positioned its Crusoe processor as a balance of computing performance and low power consumption, optimized for longer battery life in slimline subnotebooks or operation without noisy cooling fans in blade servers or thin-client terminals. | | | For PC designers, this means higher memory performance and a lower chip count, the latter reducing both system power consumption and motherboard real-estate requirements. | | | The CPU is a proprietary, very-long-instruction-word (VLIW) design, with a native-instruction-set software library of precisely one program: the Code Morphing software layer written by Transmeta, which converts x86 instructions into VLIW instructions in real time. |
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http://www.cpuplanet.com/features/print.php/3116071
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| Â | Personal Computer CHIPLIST 9.9.5 part 4 of 5 |
| | Cyrix 6x86 CPU: 3.3 V (C016) or 3.52 V (C028) core, or voltage switching supporting both, 5 V tolerant I/O, from revision 2.7 less power consumption. | | | Cyrix 6x86L CPU (low power): 2.8 V core, 3.3 V I/O. (Cyrix 6x86L-PR120+ CPU). | | | Dual voltage: 2.8 V core, 3.3 V I/O. (Cyrix 6x86MX-PR266 CPU): March 1998, 2.9 V core, 3.3 V I/O. (Cyrix 6x86MX-PR300 CPU): April 1998, 0.25 micron IBM CMOS. |
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http://faqs.jmas.co.jp/FAQs/pc-hardware-faq/chiplist/part4
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