![]() Both technologies give positive power-saving effect. First one controls both core frequency and voltage, second - only core frequency. Prior to r265329, frequency was controlled via mix of EIST and throttling technologies. ![]() So how can we use it:Įnable powerd(8) to save power by adjusting CPU frequency based on system load. Core2Duo T7700 CPU has 2 cores, runs on 2.4GHz frequency, supports EIST technology with P-states at 2400, 2000, 1600, 1200 and 800MHz levels, supports C1, C2 and C3 idle C-states, plus throttling. Under the full load it alone may consume more then 40W of power, but for real laptop usage the most important is idle consumption. Some of them are working automatically, other have significant requirements and need special system tuning or trade-offs to be effectively used.ĬPU is the most consuming part of the system. Modern systems, especially laptops, are implementing big number of power-saving technologies. The main character of this story is my 12" Acer TravelMate 6292 laptop with C2D T7700 2.4GHz CPU, 965GM chipset and SATA HDD. Actual TDP may be lower if not all I/Os for chipsets are used.I would like to summarize some of my knowledge on reducing FreeBSD power consumption and describe some new things implemented in FreeBSD 8.x/9.x. System and Maximum TDP is based on worst case scenarios. Processors that support 64-bit computing on Intel® architecture require an Intel 64 architecture-enabled BIOS. See for more information and applicability of this technology. Max Turbo Frequency refers to the maximum single-core processor frequency that can be achieved with Intel® Turbo Boost Technology. See for more information including details on which processors support Intel® HT Technology. Processor numbers differentiate features within each processor family, not across different processor families. Intel processor numbers are not a measure of performance. Please refer to the Launch Date for market availability. Please contact OEM for the BIOS that includes the latest Processor configuration update. Functionality, performance, and other benefits of this feature may vary depending on system configuration. Please check with the system vendor to determine if your system delivers this feature, or reference the system specifications (motherboard, processor, chipset, power supply, HDD, graphics controller, memory, BIOS, drivers, virtual machine monitor-VMM, platform software, and/or operating system) for feature compatibility. ![]() ‡ This feature may not be available on all computing systems. Refer to Datasheet for formal definitions of product properties and features. Your company as an importer and/or exporter is responsible for determining the correct classification of your transaction. Any use made of Intel classifications are without recourse to Intel and shall not be construed as a representation or warranty regarding the proper ECCN or HTS. Intel classifications are for informational purposes only and consist of Export Control Classification Numbers (ECCN) and Harmonized Tariff Schedule (HTS) numbers. Please contact system vendor for more information on specific products or systems. The information herein is provided "as-is" and Intel does not make any representations or warranties whatsoever regarding accuracy of the information, nor on the product features, availability, functionality, or compatibility of the products listed. Intel may make changes to manufacturing life cycle, specifications, and product descriptions at any time, without notice. All information provided is subject to change at any time, without notice. ![]()
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