CPU 70-80C idle, video lags in editors on preview.

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My CPU has recently been locked at a constant 70-80C (80 usually) at idle, but the rest of the system seems to be at 30-40C according to speedfan and core temp. (My Cpu used to be usually at 40-60C Idle depending on what I'm doing). When I try to edit videos in my various video editors, the video preview will lag and have frame drops or plays sporadically, encoded videos maintain this behavior, but videos viewed online or on media players remain fine, so I think this is a CPU issue. The videos never have issues on playback in media players.

A friend of mine told me it might be something wrong with the CPU (they agreed with me) and that the CPU is probably too hot to function properly, so what I'm going to do is clean my computer free of dust (I think its pretty dusty, this might be the cause, as the video editing issue only happened very recently) and then check to see if the issue is still around.

Or is it something else? Is my CPU becoming faulty??? I leave my PC on constantly when I'm away from home to run tasks. Please, help me troubleshoot the cause, list the most likely reason for my workflow having this annoying issue. (In numbered form if possible). Also, if it is the dust screwing things up, how do I safely get rid of it?

Thank you.
 
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toddybody
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toddybody

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Hey Friend...sorry about your issues. Definitely clean out your case, IMO the best way is to take it outside and blast it with some compressed air...then take a lightly damp cloth and wipe the surfaces over. I would recommend taking off your cpu cooler, cleaning it with rubbing alcohol...applying new thermal paste and testing from there. You may just need a new cooler.
 
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Ah.. that might be doable, but thats weird, I've only had the cooler for about a year, it should still be functioning properly.
Maybe it's either the paste or the dust, but if cleaning the dust first doesn't work, I'll just reapply the paste and test everything out again.
 
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alexakis99

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have you tried other programs?i have seen speedfan say 80C while other programs say 30C.Try HWMonitor
 
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ComplexArray

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I cleaned the computer of dust, and HWmonitor and other programs still give the 70C/80C, however, it started off at around 55C on bootup, and slowly went up as each second passed, perhaps my thermal paste has decided to expire on its own?

Obviously this is a CPU thing, because the rest of my system is 30-40C, including the GPU. The fans all work. So if I replace the paste my CPU will stop "overheating"?

Also, the computer seems to run a bit more smooth, but the CPU seems to be stressed for some unknown reason. I checked the paste as I was cleaning the interior and it seemed to be ok, but maybe the paste has already dried up, I do leave my computer on 24/7.

What are the possibilities?
 
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alexakis99

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running it 24/7 may have "damaged"(lost it's performance) the paste inside the cpu(under the lid)if anyone confirms it here, you have to open the cpu and change the thermal paste i don't know if it's the same thermal paste as the ones we use outside the cpu.
This might help you https://www.youtube.com/watch?v=8SFh4LA_byE
 
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ComplexArray

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I did not know that CPU's have paste "inside of it". The only paste I used or applied was on top of it.
Opening it seems a bit extreme though and I wouldn't want to risk damaging the CPU. It's possible the paste I applied just dried out from continuous use...

I'm skeptical of your suggestion, and will only really consider it if other people confirm, other than that I'm going to run to the store and get some new thermal compound to reapply to the CPU and see if that does anything.
 
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alexakis99

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i wouldn't open it myself without a reason either.Just posting it to see if someone who knows,thinks that's what is causing it.Yeah,you should apply new paste on the cpu and see if it does anything,which i think it will.
 
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ComplexArray

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I cleaned the inside of the computer, and reapplied some new thermal paste, yet I'm still getting the same temperatures... what the heck? Is my CPU dead or something? Why is it stuck on 70-80c? Maybe I leave it on too much...?? Agh this is confusing.. why is it running hot...

*Also, while I removed the CPU cooler, I saw that the paste was there, but it was pretty dried up, looks like my CPU got pretty hot, the video editing lag seems to have gone away a bit as well.* Ah! I fixed it, the problem was that it seems my cpu fan died (Consequence of leaving it on all the time* so the heat being transferred from my CPU to the heatsink was basically stuck inside of the heatsink! Good thing I opened it up again and made sure all the fans were working.

If anyone else has a similar problem, make sure all of your equipment is working before and after you clean the inside, you might save yourself a hassle. My heatsink had a lot of dust on the back, so I made sure to clean it off with a quick rinse/alcohol.

My computer is now idling on 30-20C like its meant to, I'm glad I got back my low readings.
Everything is fine, thanks for the help, all it needed was a little maintenance.
 
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toddybody

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Glad you figured it out! BTW: You should never worry about a CPU fan dying after a year of use. Regarding the dude's post above...there is a thermal interface material (TIM) inside the CPU package, between the actual CPU face and the chip's lid. Some enthusiasts remove the lid (i.e., "de lid") and apply a better TIM. This is overkill IMO and not worth the risk. The "dried" paste you saw when you removed your heatsink was totally fine. You DO want to clean it off an apply new paste every time you remove the cooler though...but that should be a rare event.

Again, glad your troubles are sorted out!
 
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