AMD FX 8350 Overheating to PC Failure

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jnboyd9

May 14, 2018
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Running an AMD FX 8350, about 4 years old. Overclocked to 4.4ghz at (I believe) 1.325V. Lately I've been having some issues with higher temps, have liquid cooling (Corsair H100i v2, only a year or two old). My overclock was stable for years, before I got liquid cooling and after. After noticing some high temps, about 45-55 C at idle, I reapplied thermal paste and got my temps down to about 22 C at idle, give or take. This was about a week ago. Fast forward to today, I open Overwatch and when the menu loads my PC promptly shuts off. It does not begin a shutdown sequence, it powers down immediately. When I reboot, and open Overwatch again but this time monitoring CPU, I see my CPU usage spike to 100% and my temps climb into the 70s before my PC again promptly shuts down. And this is where I'm at.

I'm wondering if this could be a Power Supply issue but I'm hesitant to think so given that the the CPU usage is spiking to 100% and overheating immensely. I'm not sure how to go about testing my liquid cooling but based on all reports in the Corsair Link software it's running perfectly fine, I am running it at full capacity (Performance mode, fans at 100%). Fans are all clean, case is dusted, airflow is good as far as I can tell. So now I'm leaning towards it being my CPU. I suppose my question is, would a failing CPU overheat like that and is there any way to test it? And what should my troubleshooting steps be? I'll list my system specs below.

Windows 7 64 bit
AMD FX 8350 Processor (Overclocked to 4.4ghz at 1.325V)
Nvidia GTX 970
Corsair 850w Gold PSU (Unsure of the details of this one off hand)
Corsair H100i v2 Liquid Cooling
G.Skill Trident 16GB RAM
ASUS ROG Crosshair V Formula Z AM3+ Motherboard
Like 4 Hard Drives
 
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Removing heat from CPUs is a physics thing; a CPU doesn't suddenly fail to "get cool" anymore than a broken ice cube tray will prevent water from freezing. The first thing to do is to remove the overclock and see what happens. Then to check if the pump to the cooler is working and whether the cooler was re-attached properly.
 
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Have the same CPU on CHFF for almost 6 years and it's a real beast of furnace when overclocked, and even without overclocking, I have it on stock speeds cooled by an H80 in pull, idles at 38 to 42 in a 20 degrees room temp, in a case with open side panels and plenty of powerful 120mm fans that I ramp up speed around 1500 RPM and more while gaming.
Watch also your motherboard NorthBridge temps (T2) in HWINFO64 have it configured to show in the systray when gaming and graph monitor on my second screen with an extra fan blowing on it and on the top of the video card.
I ended up running the CPU at stock speed after coming to the conclusion that the boost in performance benefit is negligible compared to the inconvenience of the gigantic increase in the amount of heat it dissipates when overclocked.
If I miss ramping up fan speeds through Asus utility when gaming, I end up with a sudden shutdown even though CPU is only at 55, so basically I have to maintain my 8350 below 50 and Northbridge T2 below 65 in order to have a decently responsive system while gaming and that doesn't shut down on me unexpectedly.
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So bit of an update, this situation has become worse, as in something is deteriorating it would seem. Under about 5-10% load i'm hovering around 58-60 C. I would suspect it's the cooler but it's mounted properly, with the right amount of thermal paste, and all reports in Corsair Link indicate that the fans and pump are both running at their proper RPMs. I have removed the overclock and the processor is now running stock at 4ghz. I'm now suspecting the processor, as recently instead of the PC just shutting off I received a BSOD, I don't think my liquid cooler would have anything to do with that.
 
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Those are pretty high temps for stock speed idling CPU, you said you remarked those temps increase prior to installing the cooler, did you change any of your hardware before that?
- I would check CPU pins for integrity and re-install air cooler for awhile with bare minimum hardware attached to the mobo (might even get more insight if taken out of the case)
- I would also check voltage and key clocks under windows and in the Bios and insure there is no sneaky or automatic overclock on CPU or memory or just reset Bios to it's default values, that would take care adjusting some advanced stuff like CPU voltage frequency, Phase control, load line calibration of CPU and NBridge.
 
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Thing is nothing has changed. I was using the same OC profile for years with zero issues. Changed from air to liquid cooling a couple years ago and again, no problems at all until recently. I had noticed slightly higher temps than usual recently and did the thermal paste reapplication and noticed no changes. What's (slightly) interesting is I reapplied thermal paste a second time, but on this round removed the processor from the mobo, cleaned it and put it back. PC recognized it as a "new" processor and my temps were great. 16 C at idle and 35-40 under load. Fast forward to now and I'm getting more issues, it seems to be deteriorating, or something. I'm out of ideas, but Newegg has the 8350 for 80 bucks right now so that might just be the path I'm headed down...
 
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Might be simple CPU degradation from a little overclock abuse! mine still runs like a champ after 5 years of service, never run it on overclock except from few experiments every now and then, doesn't really like to be overclocked!. Good luck with your replacement, but it wouldn't hurt if you have some spare time to get mobo-cpu out of the case for some testing.
 
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Mine's almost 4 years old so this is a rather sad day. As an aside, I was (accidentally) running this guy at over 1.5V for an extended period of time, first time OC'ing, before getting it down to 1.325V, so that may have been quite a bit of extra wear and tear during that time. Don't plan on OC'ing this one lol. Appreciate your input.
 
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That is definitely brutal, that might have caused insidious damage to the chip, but at least you experimented plenty of overclocking with it, mine has been running at 4Ghz, 1.375V for the last 5 years, and getting it ready to retire very soon, hopefully.
 
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Idle temps from a cold start can still look ok with a dead AIO, Throw a air cooler on it the 8350 came with a cooler unless you pawned it for tic-tac's.
 
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Alright new update, it's not the CPU. RIP 80 dollars. I'm running a virus scan and under 25-30% load we're at 55 - 60 C. Fuck my life. Ran prime95 after installing it last night and it was running steady at 65 C while that was going on which is a tad high but it was steady so I felt alright about it. After shutting down prime95 the temps very quickly went back to normal. My radiator temp right now is at 35 C, my fan is running at 2160 rpm and my pump at 3120 rpm. This leads me to believe it's not my Corsair AIO, though I should probably still test it. So I guess that's my next step. Question, I've been using some thermal paste that's a 2-3 years old (Arctic Silver 5). I've no idea if this stuff has a shelf life, but if it does, wondering if that could be a possible issue. Assuming my liquid cooler is working, which I think it is but who the hell knows at this point, I guess I'm moving on to checking the Power Supply next. Any guesses are greatly appreciated.

Also, my voltages to my CPU fluctuate, I don't think I set a static voltage in the BIOS but they're anywhere from 1.25 to 1.4V. Don't think that would have anything to do with it but I am running the fuck out of ideas.



One tube is cool to the touch, other is slightly warm, nowhere near what I would describe as hot however. And the radiator is pulling in cool air from the touch. I think my one front fan was running at a slightly lower RPM than usual, like 600 RPM but I can't imagine that would cause this. MOBO temp 1 is at 48 C and the other is at 27 C. Info from Corsair Link, not sure what those temps reference but again, don't seem terribly high.

More info, my cooler is slightly "loose". As in, when it's screwed in place on top of my CPU it can wiggle around, maybe like a quarter inch in each direction. Not sure if this is normal or if anyone else has had some experience with this but again, this thing was completely fine for over 2 years. Even having moved the PC around bringing it to LANs and such I never had any issues. Don't know why they would start now but who the heck knows. I'm starting to think PSU.
 
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You can use Hwmonitor to keep an eye on clocks, temps and voltages.
Those temps are great for your Corsair AIO, my CPU thermal paste was re-applied 4 years ago still holding no issues, AIO tubing are warm to a Little hot to the touch if fan is at low RPM (I keep it at 1100-1300), but there is always hot stream of air coming out of the AIO fan means the AIO is working great and temps are stable within it's usual performance, above 55 degrees the pump starts making weird noise and it alerts me to increase fan speed when I forget, it's indispensable to have a strong 120mm fan with adjustable speed blowing horizontally above the graphic card PCB and onto motherboard VRMS and north bridge.
 
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i would bet its the AIO cooler. Maybe the liquid has gone bad somehow or the pump isn't actually working and it's reporting that it does. From what I see, you've tested everything except using the stock cooler and disabling your OC to check if it's actually working.
 
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Reapplying stock cooler to rule out bad CPU cooling was suggested at the beginning but was skipped because he reported noticing CPU temps increase prior to the AIO installation.
Anyway Vishera runs hot, at room temp 22 idles at 40 with minimal AIO fan speed at 1000RPM in pull only.
Add 3-6 degrees for closed case side panels and absence of extra fans for more sustained horizontal airflow above and below graphic card level
Add 3-6 degrees for 30% load
Total = 46 to 51 degrees is the norm for FX-8530 in closed case with minimal cooling at light load at 22 degrees ambient temp (72 F)
 
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OC is disabled, I have a strong feeling it is not the AIO. I don't know why I would be getting variable RPM readings from my fans and pump, with the tubes not being warm and the radiator pushing out/pulling in cool air and a variable temperature reading but...at this point I don't have many other options. Like I said, I ran prime95 last night after installation and she held at 65 C for the whole thing, passed the tests that were ran, then I shut down for the night. Today, played some Overwatch, temps in the mid to high 50s mostly, went to the gym and came back to my PC having recovered from a BSoD. Went to the movies and came back and nothing new happened. So who the hell knows at this point. I guess I'll get around to regrettably testing the cooler, though I think it's pointless.



I will say this, my old processor was failing. It would idle in the 50s and as soon as I started up a game it would shoot to 100% usage and 70+ C. I'm sitting in the low 40s right now under light load with the new one. Honestly, I never really monitored the temperature much before, so I don't have a comparison point for what it should be, but I feel like getting to 60 degrees Celsius when playing Overwatch on liquid cooling is excessive, but again, I don't have a reference point for it. All in all I haven't had any issues with this new processor overheating to the point of failure, my most recent concern came of coming home to my PC having recovered from a BSoD, which is an issue I had when my old processor was installed.
 
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All ideas tempt me. I am slowly venturing towards insanity here. Prime95 last night runs at about 60 C to 65 C. About an hour ago I ran it for about 30 seconds and watched temps quickly climb to 70 C, running it now for close to 20 minutes and she is rock steady at 50 C. I'm going nuts, I swear I feel like I'm losing it here.
 
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Lol, maybe you had the AIO fans running at slower speed yesterday, explaining the higher temps,anyway don't overwhelm yourself with this, get a break now that everything is sound, and when refreshed and have some spare time you can venture into some further testing.
 
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The same I said before. You can't really trust AIO readings and if it's working intermittently, there's no way to be sure if it's the cause or not. I don't see where the problem for jnboyd9 is on testing with the stock cooler. Unless the computer is in an engine room or some sort of sauna, stock cooling is designed to work at stock speed and as long as it's clean, should provide enough stability to discard another possibility.

jnboyd9, I'm telling you to try this because I had a similar issue before with another AIO which had about half of its liquid drained through a leak that I couldn't even see until I removed the whole thing from my case. It was kind of a miracle that none of the liquid spilled over any electronics. My issue was similar to yours but I didn't even remove the cooler for those troubleshooting purposes, I just didn't have the time and found out by luck. The truth is that with any AIO there's no way for you to tell if the liquid is gone or if the pump is going bad unless you take it apart. It seems to me like it could be a very simple solution for which you've already gone over a lot of failed solutions and shouldn't be that way. It's not like you are using a brand new chip. And I know those chips since I still own 3 pc's with those CPUs in them.
 
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I don't see issues with a AIO as long as you have the pump speed ( verify is at default speed or if it's a custom speed take it in consideration in your evaluation of the performance of the AIO) and fan speed displayed on your monitoring software and you have a cooling performance within the usual for the room temp/rad fan speed. I have corsair H80 although abused by FX-8350 high temps and the use of only one rad fan in pull still running strong after 5 years of daily 4-8 hours use :)
 
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