Slow cpu clock on my Latitude E4300 in windows 7 x64. 665Mhz instead of 2400. High Performance in power options, AC power.. but no luck.

What CPU do you have?

SP9400

And btw, i tried to load windows in safe mode and saw that cpu-z shows correct frequency. Seem OS underclock my cpu somehow

I also see this message in my eventlog

The speed of processor 1 in group 0 is being limited by system firmware. The processor has been in this reduced performance state for 71 seconds since the last report.

The speed of processor 0 in group 0 is being limited by system firmware. The processor has been in this reduced performance state for 71 seconds since the last report.

As the message says, ur firmware is being limited by the firmware, try the download a new version of the firmware from support.dell.com

That's what i did at first. ugraded to A17 (latest). Didn't help

Please help.  is anybody run windows7 64bit on e4300 with same issues?

That's what I'm asking - what is the power rating of the power supply?  65W?  90W?  130W?

What is the power rating of your power supply?

discussion about this, but yet.. still not resolved:

http://forum.notebookreview.com/dell-latitude-vostro-precision/489628-slow-cpu-clock-my-latitude-e4300-windows-7-x64-665mhz-instead-2400-high-performance-power-options-ac-power.html#post6335734

Help :emotion-9:

my battery is dead, i don't use it. Only AC power.

it says 19V and 4.62A. So i suppose it's 90W

It worked normally under XP and under Vista.  The problem is only in windows 7 64bit

There was 3 items in the 'Chipset' section:

- Intel AMT HECI

- Intel AMT SOL/ LMS

- Ricoh R5C847

First two wasn't installed, they alerted that hardware not compatible, third (Ricoh R5C847) installed without any problems.

Next question is whether you've installed the chipset driver and Dell notebook system software for Windows7-64:

http://support.dell.com/support/downloads/driverslist.aspx?os=W764&catid=-1&dateid=-1&impid=-1&osl=EN&typeid=-1&formatid=-1&servicetag=&SystemID=LAT_E4300&hidos=WLH&hidlang=en&TabIndex=&scanSupported=False&scanConsent=Falsec

Did you install the notebook system software?

http://support.dell.com/support/downloads/format.aspx?c=us&cs=19&l=en&s=dhs&deviceid=18898&libid=7&releaseid=R260746&vercnt=1&formatcnt=0&SystemID=LAT_E4300&servicetag=&os=W764&osl=en&catid=-1&dateid=-1&typeid=-1&formatid=-1&impid=-1&checkFormat=true

Second (DSS_UTIL_WIN_R260746.EXE) wasn't installed. I just did, and it didn't help.