CPU got hot, now PC freezes every few minutes...

May 23, 2018
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My PC froze last week. When I rebooted the bios showed the CPU at 79 deg C, which seemed very hot as normally it is around 50 - 55 deg max (AMD FX6300). Inside the case the CPU fan was broke. Put in a new fan, and running at a cool 50 degs...however, PC (running Windows 7) kept freezing every few mins at random points...total screen freeze, even ctrl-alt-del does nothing, only solution is pull the plug.

Even safe mode had same issue. So, did a format of the HDD and fresh install. Installation went fine, but same issue, before even getting chance to install any apps... Just moving the mouse around is enough to freeze it up.

Had a spare HDD, so did another fresh install...same thing, so HDD seems ok.

Had spare RAM, swapped that out, no difference.

There are only 3 more components / permutations that I can try (I think) - swap CPU, motherboard, or graphics card. But I don't have spares of any of these so will have to order some... (money :-( )

Would I be correct in guessing that the CPU was permanently damaged in the overheat?

In any event, I have no way of knowing so plan to opt to swap in least expensive order....the CPU is only $60, but the motherboard is around $150 and the graphics card $250...is this a sensible approach? Could it really be the motherboard or GPU? (Hoping not!)

Any thoughts?
 
May 23, 2018
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It is the stock cooler that came with the processor (supplied as a complete unit from Amazon with heat sink and fan, no mods). I've never overclocked it or adjusted any factory settings. This is what I ordered, and I simply put it all together (worked fine for first 6 months until this overheat of CPU due to CPU fan stopped spinning):

- AMD FX6300 Black Edition AMD FD6300WMHKBOX FX-6300 6-Core Processor Black Edition c/w stock sink fan
- Motherboard MSI 970A-G43
- Graphics Card MSI N750Ti-2GD5/OCV1
- Ballistix Sport VLP 8GB Kit (4GBx2) DDR3 1600 MT/s (PC3-12800) UDIMM 240-Pin Memory
- KingDian 2.5" 7mm SATA III 6Gb/s Original Brand SSD Internal Solid State Drive for Desktop Laptop PCs - S400 120GB
- PC Power Supply EVGA 430W
- LiteOn IHAS124-14 24x SATA Internal DVD-RW

Is there any other info that I'm missing?

 
May 23, 2018
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No, haven't done that. Would that help to determine the problem? What clock speed (or how much % under) and what voltage would you suggest I try? If it works on lower frequency & voltage would that prove the CPU was damaged? I would say that now the new replacement CPU fan is fitted the temps are back down to 50 degs again, so temp shouldn't be an issue. It only once got up to 79 deg when the fan stopped spinning (possibly more actually as it was dropping fast from 79 deg when I saw it after the reboot, so maybe as much as 85 as a guess judging from the time of freeze to reboot and accessing bios).

What puzzles me (a lot) is that I've done two fresh installs...an installation seems to be quite (CPU) intensive, and takes a good 30 mins requiring input and restarts etc...yet in both cases there was never a hint of freezing or any issue. But as soon as you try to use Windows (e.g. open File Browser) everything freezes...