CPU running very hot after PC "died"

Jun 14, 2018
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TL;DR - Computer died while I was AFK, noticed a bad smell, wasn't PSU, wasn't RAM, began to function after removing my GPU, but now my CPU runs way too hot. Tried reseating my CPU, still hot.

Hello all. This is my first time posting on these forums after using the countless resources here for troubleshooting my PC over the years. I never thought I would have to be making my own thread with my specific problem that I could not solve on my own.

Yesterday, I started my day like any other, booted up my PC, opened up a Twitch stream in the Twitch app, opened Discord, and a couple tabs of Google Chrome. I left my room for a short while to use the restroom after my PC had already been running for about an hour or so, only to return to my monitors in the "sleep" mode and my speakers still on, but my PC was off. (With this info I know the problem does not stem from my outlets/power strip)

At first I thought, I didn't have any updates queued, did I? So I pressed the power button, but nothing happened. Fear started to set in. I got low to my PC and instantly noticed a smell that should not have been there (burning, melting?). I quickly unplugged my tower and took just my PSU cable and my tower to a new outlet in the house to see if it could have been my room's wiring. I plugged in the PSU, pressed the on button, and got 1 half second of my LEDs kicking on and fans beginning to spin, only for it to stop instantly.

I started my google searches. A lot of posts led me to believe my PSU was shot. Hell, I've had the PC for 4 years now, maybe that's something that could have gone out. (my PSU is a
Corsair - Builder 600W 80+ Bronze Certified ATX Power Supply) Luckily, I had a spare PSU that had -100W than my previous, but could still fit my needs. I put in the new PSU, booted the computer... only to have the same issue. I was concerned. It must not have been my PSU then, because I got the same half-second LEDs and fans turning on.

Next I tried unplugging my GPU, perhaps that got blown out. (My GPU is a ZOTAC GeForce® GTX 1060 3GB) After unplugging and removing the GPU entirely, the PC booted! I was happy, but also concerned. I knew the problem wasn't the PSU. I put my old PSU back in and the PC booted fine again. Okay, my 4 year old PSU is okay. Good. I figured the problem lied within the Graphics card. I contacted my manufacturer of my GPU and confirmed that I am still under warrantly and able to swap out my GPU with a new one if needed If I removed the card and the PC worked fine now, it must be that simple! I was wrong.

I put my old GPU (my old GPU is a Sapphire - Radeon R9 280X 3GB Dual-X Video Card) in my PC to hold me over until I got my new GPU (haven't sent it in yet), and installed the drivers, restarted my computer, and tried to run some tests by playing games and watching media. I instantly noticed that when I used Google Chrome to watch YouTube videos in 1080p or try and stream anime from Crunchyroll in 1080p, my browser would stutter and the media was nearly unwatchable. I tried playing COD 4 and some Dolphin games, and I got major stuttering in those games too, something that should not happen even with my old card. I watched some media I had downloaded that was in 1080p, and my computer had no problem playing video I already had on local access, no stuttering, no audio cut outs, crystal clear. With these tests done, I figured there could have been an issue with my RAM, granted that Google Chrome and games eat up RAM like nothing. I checked my sticks physically and ran the Windows Memory Diagnostic - nothing.

At this point I'm feeling defeated. The problem I thought to have isolated was not the problem at all. My computer was still acting up, and it had no reason too. I made a System Performance report using the built in program, and the only issues I got back were bad drivers for my Xbox wireless controllers, something I've always had.

I opened up Speccy next and WHAM! My eyes instantly were drew to a fat red number. 98°C on my CPU. Not right. Not right at all. MY CPU had been running so hot this whole time! I unplugged my PC again and inspected the CPU and heat sink. No visible burns or anything out of the ordinary. I reapplied thermal paste to my CPU and reseated my heatsink and turned on my PC hoping this would do the trick. Yet here I am, using Firefox to avoid high temps, making my first forum post to a tech help website. Right now I'm idling at 64°C while using only Firefox.

My thoughts at this point are either a fired motherboard or a fried CPU, but my knowledge on these subjects is only so limited. I've done nearly everything I can think of on my end, and because of that smell I am led to believe I will be needing to replace something rather than downloading a couple programs or reseating an item or two. ZOTAC has approved my request to send in my GPU, but I'm unsure as to whether or not that is the issue, granted my PC is running so hot without the card.

The only thing I could think of that recently changed within my PC within the past few days before my crash, was I took my PC out back to give it huge spray-down with air using my air compressor I have out back. I don't think this could have done anything to the PC but I just wanna keep every possible factor to this issue within my brain.

I'm at a loss as to what to do/what to replace/what is even wrong with my PC at this point and this is my last chance at fixing this machine with sound knowledge before I just start buying new parts and slapping them in until it works.

Here is a list of the parts in my PC as of right now via Speccy:

Operating System
Windows 7 Ultimate 64-bit SP1

CPU
Intel Core i5 4570 @ 3.20GHz 61 °C
Haswell 22nm Technology

RAM
12.0GB Dual-Channel DDR3 @ 799MHz (11-11-11-28)

Motherboard
MSI H81M-P33 (MS-7817) (SOCKET 0) 48 °C

Graphics
2367 (1920x1080@60Hz)
2367 (1920x1080@60Hz)
3072MB ATI AMD Radeon R9 200 Series (Sapphire/PCPartner) 41 °C

Storage
238GB Crucial_CT256MX100SSD1 ATA Device (SSD) 33 °C
931GB Western Digital WDC WD1002FBYS-18A6B0 ATA Device (SATA) 39 °C
3726GB Seagate ST4000DM004-2CV104 ATA Device (SATA) 30 °C

Optical Drives
DTSOFT Virtual CdRom Device
ASUS DRW-24F1ST b ATA Device

Audio
ASUS Xonar DGX Audio Device



P.S. Should I still send in my GPU for a replacement?

If you have read this far I honestly owe you my life, any help is greatly appreciated and will be acted upon.

TL;DR - Computer died while I was AFK, noticed a bad smell, wasn't PSU, wasn't RAM, began to function after removing my GPU, but now my CPU runs way too hot. Tried reseating my CPU, still hot.
 
Solution
Update in case anyone cares:

CPU wasn't seated properly, reading good temps now. Computer wont turn on with my GPU (Nvidia) plugged in, but it works with my old one (Radeon). Sent in the GPU for RMA. Hoping that's the only issue.
Ok you are way 5o hot at idle. First thing is to check cpu cooler installation, make sure there is thermal paste and that fan is plugged in an operating properly. You need to address this issue before you even start to mess with gpu. I'm guessing the gpu is you issue as your pc is operating without it even though it's throttling BAD. once you get the CPU temps under control report back
 
Jun 14, 2018
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I've already re-applied thermal paste and resteated my cooler fan. My fan speeds are fine and my ambient room temp is low.
 

Phaaze88

Titan
Ambassador
64C idling on a locked cpu... yikes.
Is this a stock Intel heatsink, or custom cooler? After you reapplied paste... if stock, did you make sure the four standoffs all clicked/snapped into place - cooler firmly seated?

Since you noticed burning/smoke, etc., did you take everything out and go over each piece to check for any visible burn marks?

I'd go ahead and replace the gpu, it couldn't hurt. Also, when you installed the old R9, you didn't remove the 1060's drivers, did you? See, AMD and Nvidia drivers don't get along, and they duke it out as soon as they make contact. That would be the cause of your stuttering and audio crashes.

You checked with two different power supplies, both worked. I would still go over everything to check for any visible burns.
My guess is that the motherboard crapped on you.
 

luckymatt42

Upstanding
May 23, 2018
446
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If the cpu has been running that hot through this ordeal, it may be possible that it's just fried, or severely degraded. Yes the cpu does have overtemp and overvolt protections built in (to shut itself down to prevent damage), but if you're running that close to the thermal limit for any amount of time, it is entirely possible some degradation has occurred.
 
Jun 14, 2018
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It's a stock Intel heatsink, and I only heard one distinct click once all 4 points were pushed into the mobo. The cooler didn't want to move after that, so I think I applied it correctly.

I haven't been able to look at the GPU since I would have to unscrew the housing and that may void the warranty. I haven't been able to inspect my mobo entirely, but I did not notice any signs of burning or melting where the CPU lies, where the GPU lies, and where the RAM lies.

I haven't uninstalled my old drivers yet, but I think it stutters when the CPU hits high temps, because it can play local files with no problem whatsoever.


 
Jun 14, 2018
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This seems likely granted the PC is now 4 years old. Would degradation make a burn smell at a certain point?
 
Jun 14, 2018
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That makes sense, got REALLY hot, something got melted or burned a little, smell occurred. Maybe the fail-safes kicked on when it got so hot that the PC shut itself off? But why would it now turn back on without the GPU, and why is it still running hot? Just degradation is the answer?
 
Not to worry... too much.
The processor will slow down or shut off to protect itself if it detects a dangerous temperature.
That is around 100c.
Your processor should be OK.

f the stock cooler is functioning and is mounted properly, you should see 10-15c. over ambient at idle.
The cooler fan should be spinning.

First thing to check is that your case has sufficient airflow to feed the cpu cooler.
Take the case covers off and direct a house fan at the innards.
If all works well, look to case cooling solutions.

Recheck your cooler mount:
----------------how to mount the stock Intel cooler--------------

The stock Intel cooler can be tricky to install.
A poor installation will result in higher cpu temperatures.
If properly mounted, you should expect temperatures at idle to be 10-15c. over ambient.

To mount the Intel stock cooler properly, place the motherboard on top of the foam or cardboard backing that was packed with the motherboard.
The stock cooler will come with paste pre applied, it looks like three grey strips.
The 4 push pins should come in the proper position for installation, that is with the pins rotated in the opposite direction of the arrow,(clockwise)
and pulled up as far as they can go.
Take the time to play with the pushpin mechanism until you know how they work.

Orient the 4 pins so that they are exactly over the motherboard holes.
If one is out of place, you will damage the pins which are delicate.
Push down on a DIAGONAL pair of pins at the same time. Then the other pair.

When you push down on the top black pins, it expands the white plastic pins to fix the cooler in place.

If you do them one at a time, you will not get the cooler on straight.
Lastly, look at the back of the motherboard to verify that all 4 pins are equally through the motherboard, and that the cooler is on firmly.
This last step must be done, which is why the motherboard should be out of the case to do the job. Or you need a case with a opening that lets you see the pins.
It is possible to mount the cooler with the motherboard mounted in the case, but you can then never be certain that the push pins are inserted properly
unless you can verify that the pins are through the motherboard and locked.

If you should need to remove the cooler, turn the pins counter clockwise to unlock them.
You will need to clean off the old paste and reapply new if you ever take the cooler off.
----------------------------------------------------------------------------------



 
Jun 14, 2018
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In my post I mentioned that I have already reseated my cpu and stock cooler and I have done so properly, and I am still getting the same reading on my temperatures for my CPU. I'm going to try using a friends old CPU to see if it is either my MOBO or CPU that is damaged at this point.
 
Jun 14, 2018
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Update in case anyone cares:

CPU wasn't seated properly, reading good temps now. Computer wont turn on with my GPU (Nvidia) plugged in, but it works with my old one (Radeon). Sent in the GPU for RMA. Hoping that's the only issue.
 
Solution