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PostPosted: Wed Aug 02, 2017 7:07 am 
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On start up my pc sometimes starts with the fan on max and when I check with speedfan the third of the temp readings is high which has triggered the fan, when I reset bios to default the third temp reading reduces by about 40 to 50 degrees instantly and it runs ok. When in bios the temp reading also shows as high and reverts after bios reset

I have had a few BSOD recently too BC101 which fix on restart but may be another issue

I have run avg and malwarebytes and checked to see if the fan is fitted tight to the processor it is, so am thinking its either a software problem on start up.

Also Machine is over 6 years old and I haven't changed the cmos battery wondered if that was the problem


Any ideas appreciated


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PostPosted: Wed Aug 02, 2017 5:01 pm 
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The thermal compound has dried out or the heat sink is full of dust or both, remove the ram and processor clean out the dust and remove the thermal compound from the processor and heat sink and replace with fresh

Dust causes all sorts of issues.

Its nothing to do with the bios battery or software imho

edit. It could also be the fan failing (pulling to much current to start at slower speeds)



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PostPosted: Wed Aug 02, 2017 9:25 pm 
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Thanks flash,

I have dusted the case out and heat sink with compressed air it wasn't too bad but the heat sink fins were dusted up. I haven't taken the fan off and applied thermal compound so that looks like the next job, the fan screwed to the mbo so I wasn't sure how it would screw back in think its got a retention bracket
http://www.ebay.co.uk/itm/Metal-Cooling ... 2103113551


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PostPosted: Thu Aug 03, 2017 10:10 am 
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do you know what processor it is, a picture would help as there are so many retention systems from plastic push pins to screw in types


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PostPosted: Thu Aug 03, 2017 11:13 am 
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That's just a standard heat sink bracket it should have a fastener at each corner.

I use Arctic Silver thermal paste on mine. If it keeps a 3970X processor cool (the heat sink is also water cooled though) it won't have much trouble with yours :wink:

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PostPosted: Thu Aug 03, 2017 11:27 am 
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arctic silver is good but there are a few types - if its a standard pc with nothing special Akasa 455 will do the trick

if its a stock heat sink and fan, swap it out for a new one



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PostPosted: Thu Aug 03, 2017 5:49 pm 
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Thanks for the replies

Attached photo hope it works. The fan has steel screws with springs. Working ok at the moment so its an intermittent problem but probably best just to swap it out for a new L775 socket cpu cooler given the cost.

Also added the speedfan readings the low one temp 3 17C is the one that starts at about 67 sometimes then fan 1 runs at 4500 rpm noisily until I go into bios and reset bios settings then it stops.

Thanks


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PostPosted: Thu Aug 03, 2017 6:43 pm 
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The one you have there is a 775 coolermaster/akaska (oem)

eg. https://www.scan.co.uk/products/akasa-a ... th-pwm-fan



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PostPosted: Sun Sep 24, 2017 11:52 am 
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Thought I'd just do a note on how I got on with my pc

Before I bought a new fan I had one last go at trying to find out why it kicked in intermittently

1. Switched from AVG to MSE
Looked at software that had installed around the time that problem started , it seemed to coincide with various software updates but Avg free antivirus upgrade looked the likely culprit as it was also taking ages to load so I deleted that using the software uninstall tool (still left some .sys files and toolbars) and installed Microsoft Security Essentials.

2 Stopped Malwarebytes loading on start up
Turned off autoupdate in Malwarebytes as it was loading itself into start menu
That had installed itself in start up and was taking a minute to load so took that off start up

3Stopped all other non essential software loading on start up.
Just microsoft, intel, graphics, sound, wifi

That stopped the fan problem on start up

4 Stopped Software autoscheduling update checks in Windows Task Scheduler
A lot of the software was loading up scheduled update checks daily or even hourly. Google chrome had 4 running, but nvidia, canon, adobe , malwarebytes and CC cleaner were also doing scheduled updates. Whenever they did an update they would add themselves back into start up

5Worked my way through Errors listed in Event Viewer and fixed as many as I could

It now starts up in about 45secs including sign in, which I am happy with the fan does not rev on start up at all now, partly due to lower ambient temp I suspect I am also not getting the buzzing of the hard drive as all that software checks for updates

Found speccy from piriform (free download) useful for an overview of system including temperatures
https://www.piriform.com/speccy

Thanks again to Bob 225 for pointing me at the right fan as I would have picked the wrong one anyway. I am sure the information will come in useful at some stage


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PostPosted: Wed Nov 22, 2017 5:51 pm 
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i use to have a lot of CPU temp problems especially under gaming conditions. An external liquid cooler kept the CPU
temp right down even under max load. Great piece of kit!


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