HP dc7608 - Convertible Minitower PC Frequently Asked Questions Manual
Runtime power management v1.0
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Runtime Power Management
v1.0
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
What is EIST? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
What is Cool'n'Quiet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Why are EIST and Cool'n'Quiet needed? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
What are the required components for EIST and Cool'n'Quiet to function? . . . . . . . . . . . . . . 2
How will EIST and Cool'n'Quiet impact HP Customers? . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Advantages of using EIST/Cool'n'Quiet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Disadvantages of using EIST/Cool'n'Quiet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Known Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Resources for EIST and Cool'n'Quiet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Frequently Asked Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
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Summary of Contents for HP dc7608 - Convertible Minitower PC
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Page 1: Table Of Contents
Runtime Power Management v1.0 Introduction ............2 What is EIST? . -
Page 2: Introduction
Introduction Computer processor manufacturers are incorporating the ability to manage power use directly into their newer processors. Processors recently released by both Intel and AMD include features that work with the BIOS and operating system to lower power consumption. Along with being more environmentally friendly, reduced power consumption results in reduced heat production. - Page 3 Processor Intel’s 600 and 800 series processors support EIST. AMD’s Athlon 64 line of processors support Cool’n’Quiet. Both technologies may become a standard feature for future processors. Chipset EIST requires the Intel 915 or later chipset. Current HP business desktop systems with qualifying chipsets include: Intel 915: •...
- Page 4 For processors that support both EIST and TM2, CPU throttling is controlled by EIST and the operating sys- tem. The HP BIOS controls CPU throttling on TM2-only processors, resulting in support for RTPM. See “Known Issues” on page 9 for possible compatibility issues. There is no RTPM capability for processors that do not support EIST or TM2.
- Page 5 Power Management Scheme EIST will function only if the operating system is using an adaptive power management scheme. The fol- lowing table shows the relationship between power scheme and the control policy used. Power Scheme AC Power DC Power Home/Office Desk None Adaptive Portable/Laptop...
- Page 6 Home/Office Desk in default state Home/Office Desk in adaptive state...
- Page 7 System Properties - EIST The System Properties window displays current processor speed on computers installed with an EIST-capa- ble processor and Windows XP Service Pack 2 that are using an adaptive power scheme. The following images illustrate a drop in processor speed for an Intel Pentium 4 system (3.4 GHz) under throttled condi- tions with EIST both enabled and disabled.
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Page 8: How Will Eist And Cool'n'quiet Impact Hp Customers
System Properties - Cool’n’Quiet The System Properties window displays current processor speed on computers installed with a Cool’n’Quiet-capable processor and Windows XP Service Pack 2 that are using an adaptive power scheme. The following images illustrate a drop in processor speed for an AMD Athlon 64 3800+ system (2.4-GHz) under throttled conditions with Cool’n’Quiet enabled and disabled. -
Page 9: Advantages Of Using Eist/Cool'n'quiet
Advantages of using EIST/Cool’n’Quiet Enabling EIST/Cool’n’Quiet provides the following benefits: • Increased power savings. • Lower operating costs. • Less heat production. • Potential for less noise from slow fan speeds. Disadvantages of using EIST/Cool’n’Quiet There are no known disadvantages to using EIST/Cool’n’Quiet if you use the latest HP BIOS and/or the latest service packs for Microsoft operating systems. -
Page 10: Resources For Eist And Cool'n'quiet
Resources for EIST and Cool’n’Quiet The following web sites provide additional information about EIST and Cool’n’Quiet. http://www.intel.com/cd/channel/reseller/asmo-na/eng/products/box_processors/desktop/ proc_dsk_p4/technical_reference/203838.htm http://www.amd.com/us-en/Processors/ProductInformation/0,,30_118_9485_9487%5E10272,00.html http://www.amd.com/us-en/Processors/TechnicalResources/0,,30_182_871_9706,00.html Frequently Asked Questions How can I verify if my electricity bill is actually lower? To perform an isolated test, you can hook the system up to a power meter to see how much power a computer uses when EIST is on or off. - Page 11 Does the integration of this functionality imply that the processor speeds available are really too great for standard needs? No. This functionality simply provides more flexibility when you use applications that require less processor performance. Today’s world constantly offers more applications that require greater processor performance.
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