Quantcast E6400 overheating throttling

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  1. #1
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    Default E6400 overheating throttling

    Hi All,
    My E6400 has been suffering overheating problems with the current hot weather (over 30C degrees). When the machine overheats it begun to throttle to 75% then to 35%. Once it reached 35% the machine is extremely slow (much slower than normal 35% in power saving mode), it like the machine is put in the safe mode and it wont recover once the temperatures drops i.e. ACPI, & cpu =40s & NVS160 = 60s. The only thing fix the problem is to shutdown the machine & wait for few minutes and restarting the machine. Anyone have had experienced similar problem? I am suspecting the ACPI is triggering the machine to throttle.
    I was able to replicate the problem and here is the temperatures the machine begun throttling
    ACPI = 78C, Core 0 = 61C, Core 2= 72C, NVS 160 = 80C HDD = 45C
    P8400 -> core speed = 1600MHz, multiplier = x6 bus speed = 266 MHz, FSB =1064MHz
    BIOS = A11

  2. #2
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    Default Re: E6400 overheating throttling

    Something is wrong, that isn't hot enough to be throttling. I would try uninstalling Dell ControlPoint and seeing if it fixes your problems.

    Greg
    Dell Latitude E6400
    P8400 - 4Gb DDR2-800 - Windows 7 Pro - WLED WXGA+ - Backlit Keyboard - Intel X4500 - 128Gb Samsung SSD - 7k500 - Webcam - 6 Cell - Dell 1397 B/G - B/T

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    Default Re: E6400 overheating throttling

    Hi Greg,
    Uninstalled dell control point and restore back to windows vista power settings. But the problem still persists. When the ACPI hit the magic 79C it begun to throttle ;( I probably have to give a dell a call tomorrow.

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    Default Re: E6400 overheating throttling

    Hi. Any Luck? What did Dell say?

    Im having the same problem. It is definitely a Hardware problem. Ive tried XP, Vista and Win 7 (beta). But maybe just some wrong drivers?

  5. #5
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    Default Re: E6400 overheating throttling

    Quote Originally Posted by Bedo02 View Post
    Hi. Any Luck? What did Dell say?

    Im having the same problem. It is definitely a Hardware problem. Ive tried XP, Vista and Win 7 (beta). But maybe just some wrong drivers?
    Guys-ive had this problem for a while now.
    Are you both using the Nvidia GPU by any chance?

  6. #6
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    Default Re: E6400 overheating throttling

    My E6500 with the nVidia does the same thing...

  7. #7
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    Default Re: E6400 overheating throttling

    There is something wrong with your system. My E6400 is loaded (2.8, Nvidia), and I never even near 80C. While running at max load with an overclocked gpu, I am still under that. My GPU can be at 95 and my CPU at 75 and no throttling at all.
    Dell Latitude E6400: Intel Core 2 Extreme X9100 3.06GHz, Nvidia Quadro 160M, 4GB DDR2, 160GB @ 7200RPM, WXGA+ LED, Backlit KB, 9Cell
    Dell Inspiron 5150: Intel Pentium 4 Mobile HT 3.2GHz, Nvidia Geforce FX Go 5200, 1GB DDR, 60GB @ 7200RPM, SXGA+ CCFL

    Latitude E6400 Cooling+Performance Guide

  8. #8
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    Default Re: E6400 overheating throttling

    I have a P CPU like the OP, in my case a P9500.

    Maybe its something to do with that given that the P series CPUs are meant to put out less heat and use less Power.

    Maybe the thermal tables in the BIOS are more aggressive on the P cpus.

  9. #9
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    Default Re: E6400 overheating throttling

    Hi everyone,
    we are several E6400 users posting into the DELL support forum.

    However, DELL has started censoring our posts, even if they absolutely don't contain impolite or rude wording etc.

    The E6400 looks absolutley like having a design problem if it's not solved with an BIOS update. It throttles the CPU and/or FSB until it is not useable.

    We'd like to continue our efforts here, rather in the DELL Forum, that is why I'm replying to your post, rather than opening a new one.

    Thanks, JB
    Last edited by joeb7; 2nd July 2009 at 07:52 AM. Reason: broken URL

  10. #10
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    Default Re: E6400 overheating throttling

    Tinkerdude posted an amazingly thorough review of the problems and showed exactly where the problems are occurring over at the dell forum. Unfortunately it was censored by the mods (I'm guessing because he included a reference ID).

    He added a pdf copy of his post here:
    http://imsahp.chambana.net/~randall/dell

    I would give it a peruse.

    By the way I have also run the test and I am having the exact throttling and heat problems everyone else is, no dust or any other issues I can find.

    By the way I have a send in warranty. The only problem is I've installed new RAM and HD and I can't get access to the originals for a few months (they're in another state) will Dell repair my laptop still?

 

 
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