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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.
Known Issues
•
There are known EIST compatibility issues for i915/i945 systems using older Intel processors, older
HP BIOS, and older Windows XP service packs. These problems may include both Windows blue
screens and operating system hangs/delays. These issues have been fixed in the following:
• HP BIOS for DDR i915 systems - 786C1 v2.14 or later
• HP BIOS for DDR2 i915 systems - 786C2 v1.06 or later
• Windows XP Service Pack 2
• Windows Server 2003 Service Pack 1
Systems running Windows XP Service Pack 2 with older Intel processors that only support TM2 do not
provide RTPM capability. Windows XP Service Pack 2 supports RTPM for only EIST processors.
•
Windows XP may report inaccurate processor speed. For more information about this issue, as well
as information about determining processor speed, see the following Microsoft Knowledge Base arti-
cles:
http://support.microsoft.com/default.aspx?scid=kb;en-us;316965&Product=winxp
http://support.microsoft.com/default.aspx?scid=kb;en-us;888282
•
Windows XP on portable computers may display the following message: STOP 0x000000D1. For
more information about this error message, see the following Microsoft Knowledge Base article:
http://support.microsoft.com/default.aspx?scid=kb;en-us;888399