Loud noise from pc followed by burn smell and error message

After playing xcom 2 (a game) for 3-4 hours straight I went to the bathroom and heard a very loud noise from the pc room, the sound suggested keyboard or chair fell but when I arrived in the room my pc had turned off and there was a burn smell in the air. I could not figure out where the smell was comming from as it dissipated quickly. After reinstalling the cpu cooler and replugging all cables I turned on the pc and it got an error message: Overclocking failed: Press F1 to enter SETUP. I neved did any overclocking on my cpu and never changed anything in BIOS other than boot priority. After that message i restarted the pc and it worked fine for 8 hours that i spent updating all drivers and searching something similar to this problem.

During the night i woke up with the pc making some noises while turned off, the noise was as if some switches were turning on and off very slowly. I need help, tomorrow I need to work with this pc. BIOS detected every hardware correctly. I changed windows 10 version two days ago from pro to home and since it kept some files i thought all drivers were update but they were not so I updated them yesterday after the error. I changed the BIOS configuration from performance to power saving. I am looking for information on how to prevent this from hapenning again.

My specs 1 year old:
CPU: Intel Core i7-6700K
GPU: Asus Strix Geforce GTX 980 TI
HD: HD WD SATA 3,5´ Blue PC 1TB 7200RPM 64MB Cache SATA 6.0Gb/s
RAM: Crucial Ballistix Elite 16GB (2x8GB) 2133Mhz DDR4
Motherboard: Asus H170-Progaming
Power supply: Corsair CX 750
CPU cooler: WaterCooler Corsair Hydro Series - High Performance H60
Case: Corsair Carbide Spec-03
Reply to Alvaro__
4 answers Last reply
More about loud noise burn smell error message
  1. Is it possible for the power supply or motherboard to shut down the pc if the GPU gets too hot? I have been checking the GPU temperature on COUID HWmonitor and it has been high, reaching 84°C after 1 hour playing a demanding game. I bought a 1440p 1ms (Asus MG278-0) monitor a week ago is the GPU not being able to handle it?
    Reply to Alvaro__
  2. Given what you've described, i'd recommend completely stripping down the PC

    Check ALL psu cables & connectors for any signs of melting/burning
    Check all connectors on devices powered by the PSU for the same
    Check the motherboard & front & back for any signs of burning
    Check the GPU and its pcie connector for the same
    Reply to blockhead78
  3. ty for the answer. I did as you said altough I could not find any sign of melting or burning the problem was solved by switching all cabbles to new better ones, no more strange behaviors.
    Reply to Alvaro__
  4. It could be your PSU as it is not the best quality PSU you got.
    Reply to Kasper Jorgensen
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