Aspire 5745G overheating. already replaced thermal unit

Mortar
Mortar Member Posts: 13 New User
edited March 2023 in 2017 Archives

Hi guys,

 

I have Acer Aspire 5745G (i7-740QM and Nvidia GeForce GT420M) which recently started to run quite hot: 60C idle and 90C+ load CPU (forgot to record GPU). I measure temps with HWMonitor64.

The area of the keyboard that is located on top of the heatsink was getting really hot and it was spitting hot air from the fan vent on a side.

 

So, being a techie, I purchased a brand new thermal assembly with fan from ebay for $40. I know a lot of people just take the fan out, clean it up and reapply thermal paste. For $40 I thought, might as well put a brand new everything.

 

http://www.ebay.com/itm/Acer-Aspire-5745-DG-5745G-5745P-G-5745Z-Heatsink-Cooling-Fan-F96U-DFS531005MC0T-/112528556367?hash=item1a3339814f:g:xoUAAOSwLcNZVU1O

 

The thermal assembly already came with thermal paste preapplied which was nice. I successfully replaced it and the laptop was good for a day or so.

Idle CPU was at 45C and 70C at load. By load I mean 30%ish load of regular tasks.

 

After running Windows 10 update, the laptop progressively became hotter, again, peaking at 84C and CPU load was at measly MAYBE 40%!

In fact, while Windows 10 update was applying after restart the machine just shut off. I can only assume it was because it  reached thermal threshold, but I am not sure.

 

So, I took the laptop apart AGAIN, stripped the prepasted thermal paste and applied a nice Silver Arctic 5 thermal paste that I use on my desktops. Put it back together. It now idles at high 40C but still gets quite hot at minimal load (30%) which go over 70C and GPU peaks at 60C. And I am not playing games, just normal tasks like browsing the web, copying backup data, etc.

 

So, I know I have a brand new thermal assembly and a fan that was installed right and pushes air well which means thermal conductivity is not the problem. I have the latest BIOS installed.

 

I then ran Prime95 to stress test the CPU. It run ok up until mid 80C and then shutdown!

Checking Intel website, i7-740QM should have a TJunction max temperature of 100C. Yet, it went off at mid 80C.

Also, HWMonitor was reporting that the package was recieving over 50W of power when as per Intel, this PCU should be consuming max of 45W.

 

WHAT THE HECK?

Is the fan programming not correct and it's not aggressive enough? In which case BIOS has absolutely NO settings for it.

Has my CPU now deteriorated to the point it just runs that much hotter and eat that much more?

 

I honestly do not remember if that was ever the issue before since my father uses it. I am losing my mind here.

Please help!

 

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Answers

  • padgett
    padgett ACE Posts: 4,532 Pathfinder

    HWMONITOR from CPUID is one of my tools, it can tell you a lot. That said Intel has a set of drivers called the Dynamic Platform Thermal Framework (DPTF) that are designed to control overheating. I have seen Windows Updates break these drivers and any i7 in a portable platform is going to stress colloing.

     

    I'd check Device Manager>Intel Dynamic... for these and for the ACPI drivers under Device Manager>System Devices and see if they are working properly.

  • Mortar
    Mortar Member Posts: 13 New User

    Thanks for your response.

    The only sensible information about Dynamic Platform Thermal Framework driver is from Dell (link), is that it?

    I couldn't find anything related to Intel Dynamic ... in Device Manager. What does that mean?

     

    I also tried booting from a Linux live CD (Knippix) and the laptop appears to run quiet hot as well. I am starting to think its not the software.

    What would trigger for a CPU/GPU to run so much hotter all of the sudden?

     

    Thanks,

  • JackE
    JackE ACE Posts: 44,905 Trailblazer

    >>>which recently started to run quite hot>>>

     

    I have two questions. (1) Do you recall any significant updates/changes made around this time or did it just start happening unexpectedly? (2) Does Task Mgr CPU usage seem consistent with whatever other monitors you might be using? Jack E/NJ 

     

     

    Jack E/NJ

  • Mortar
    Mortar Member Posts: 13 New User

    (1) unfortunately, I cannot think of any particular moment when it happened, since I do not use the laptop. The only significant change was an upgrade to Windows 10 from 7 which took place approximately two years ago.

     

    (2) yes, Task Mgr shows same CPU utilization as HWMonitor. I do not use anything else.

     

    I just tried to install the latest Intel chipset (vers 10) and that failed with "Unknown Error". I want it to be a Windows issue but then again, I just tried booting into a Linux live CD and the CPU usage of about 20% triggered similar temperatures.

  • Mortar
    Mortar Member Posts: 13 New User

    double post

  • JackE
    JackE ACE Posts: 44,905 Trailblazer

    The same behavior in both OS environments suggests (to me at least) a hardware issue is more likely. Based on what you've done so far, I assume that you made absolutely sure that the intake & exhaust air ports are completely free of dust bunnies, sticky food stuff and other real-life obstructions. On the ***remote*** chance that an advanced BIOS options menu might be available on your system that has somehow been changed, try to F2 into the BIOS menu on a cold boot. Press Fn+Tab at the Info tab. Then F10 to save & exit. Do another F2 on a cold boot to see if the advanced BIOS options tab magically appears that might have impact on this issue. Report back with results and we'll go from there if needed. Jack E/NJ  

     

     

     

       

    Jack E/NJ

  • Mortar
    Mortar Member Posts: 13 New User

    The thermal module was brand new so no dust bunnies at all. I also tried taking the fan off the new module and installing into the old to eliminate the possibility new part was defective. The copper tubing and the fins by the fan are quite hot so its doing the job well. It doesn't help that both the CPU and the Nvidia GPU copper tubes are terminated at the same fins by the fan.

     

    Unfortunately, Fn+Tab combination does not do anything in the BIOS Menu (InsydeH20 Setup Utility). I am surprised how dumbed down the BIOS selection really is. The BIOS version is 1.19 and is the latest as per: https://www.acer.com/ac/en/US/content/support-product/2128?b=1

     

    Thanks for trying to help by the waySmiley Happy

     

  • JackE
    JackE ACE Posts: 44,905 Trailblazer

    OK. At this point, the only way I can think of to rule-out/rule-in the suspected hardware issue is to do something that you likely won't like---a re-set to a factory-fresh Win7 state. Jack E/NJ

     

    PS: In re-reading your previous post, I'm not referring to thermal unit fan dust bunnies. I'm referring to the actual air intake and exhaust ports on the case. The real low tech stuff. 

    Jack E/NJ

  • Mortar
    Mortar Member Posts: 13 New User

    I was thinking the same, that's why I tried Linux live boot CDs first.

    I'll load Windows 7 on a different hard drive and see what they yields.

    Also, I have to say, it is pretty hot at the BIOS menu too if i let it sit. I'd guess around 70C.

  • JackE
    JackE ACE Posts: 44,905 Trailblazer

    PS: In re-reading your previous post, I'm not referring to thermal unit/fan dust bunnies. I'm referring to the actual air intake and exhaust ports on the case. The real low tech stuff. The fan ain't gonna suck and blow right if these ports are crudded up. Jack E/NJ

    Jack E/NJ

  • padgett
    padgett ACE Posts: 4,532 Pathfinder

    Guess you missed this. It is a set of drivers developed by Intel mainly for ventless devices.

     

    BTW I have seen sudden increases in devices not used often as many updates try to load. Also I don't think any Linux version has thermal management. HWMONITOR from CPUID is a very good tool for finding physical issues.

  • Mortar
    Mortar Member Posts: 13 New User

    The intake openings on the bottom of the case are all clean and have been dusted first thing.

    Could you please re-do that link, currently it appears to be broken.

    Thank you,

  • JackE
    JackE ACE Posts: 44,905 Trailblazer

    Broken for me here too Padgett. Jack E/NJ

    Jack E/NJ

  • padgett
    padgett ACE Posts: 4,532 Pathfinder

    Try this one.

  • Mortar
    Mortar Member Posts: 13 New User

    Thanks Padgett,

     

    However, there is no option in BIOS to interract with DPTF. The only DPTF software I could find were from Dell and Asus. I am hesitant to install another brand's trailored software. Are you suggesting I should give these a try?

     

    I know TurboBoost is working because HWMonitor does show throttling of CPU cores frequency as well as how much wattage is applied to the package (higher than what is outlined as avergage for the processor)

     

     

  • JackE
    JackE ACE Posts: 44,905 Trailblazer

    If it interacts but doesn't mess with the firmware, it might be worth trying before a re-set. Jack E/NJ 

    Jack E/NJ

  • Mortar
    Mortar Member Posts: 13 New User

    I just finished installing Windows 7 on this same laptop (different hard drive).

    The temperatures are the same, as per HWMonitor. I tried to stress the CPU using Prime95 and computer shut off mid 70C.

    I noticed that CPU was operating at 45W at 100% vs 54W on Windows 10 at 20%-30%.

    Based on this, if HWmonitor readings are correct, Windows 10 provides gives CPU a lot more power than Windows 7.

    That said, i got a hardware problem?

    I will install the suggested thermal driver as a last resort.

  • Mortar
    Mortar Member Posts: 13 New User

    I tried installing DPTF from Dell and Lenovo specifically for WIndows 10 without success. I get "incompatible" error message.

    Device manager does not list DPTF at all. Acer does not have DPFT drivers for my system. In fact, the drivers listed are for WIndows 7 only, no options for Windows 10.

     

    I am at a loss.

  • JackE
    JackE ACE Posts: 44,905 Trailblazer

    >>> Windows 7 on this same laptop (different hard drive)>>>

     

    Was this a re-set from SNID-specific ACER eRecovery media? Or a generic Win7 installation? Jack E/NJ

    Jack E/NJ

  • Mortar
    Mortar Member Posts: 13 New User

    That was a generic Windows 7 install.

    Unfortunately, I do not have proprietary Acer Windows 7 media.