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JaredTCHFlag for United States of America

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Please Help Me Solve my PC's Crashing issues.

I am running a Windows 10 Home PC (64bit) and it was running great up until the last few weeks. Hardware make up is i7-7700 16gb ram and a MSI GTX1080 all on an MSI Z270 PC Mate mobo. It is liquid cooled and my boot drive (c:) is an SSD.
While playing demanding games such as Playerunknown's Battlegrounds, Rust and Far Cry5, I have experienced a couple issues. First being that for no reason given, the games will suddenly crash to desktop. It doesnt happen right away but usually after 30+ minutes of playing. The other issue I experience is after a while of play my framerate (FPS) will suddenly drop from it's typical 100-150 FPS range to 40's and even 30's. If I restart the game, this goes away usually.
My PC is an iBuyPowerPC that I got in August of 2017.
When these issues began I originally thought it was perhaps teh streaming software I was using - Xsplit.. I then switched from that to Streamlabs OBS but the issue continued. Someone mentioned using the normal OBS software so I did that and the issues still persisted.

I then ran memtest. I just ran the basic test and it passed.
I checked my cpu and gpu temps and they seemed within a good range according to MSI and Intel. the highest i saw my CPU was about 83C and my GPU highest was around 72C.  This is of course while playing.  
So I figured maybe software related.
2 days ago I wiped my C drive clean, formatted it and reinstalled Windows 10 Home. I then installed my drivers, adobe CC, Office and my games. The issue came back. So I formatted again and this time I only installed my video drive, my mouse drive, my cam, OBS and playerunknow's battlegrounds. The issue came back. This morning I just crashed to a blue screen.
I am at a loss of what to do.
How can i check for thermal  throttling?
is there any software I can run to really stress my system and log all temps? Would doing this help me find teh cause?
Any help is greatly appreciated.
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Martin Miller
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Video games leverage graphics controller/cpu, and these heat up. Do you have diagnostics for the graphic controller ?
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Jonny B

What does the actual blue screen say?
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sounds to me kike a possible failing powersupply
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I dont know if i have a diagnostic for the GPU... where would i get one?

The blue went so fast that I didnt get to reead it all. I was able to scan the QR code tho.. and that led to a generic page from MS.

I just ran one of the games (far Cry 5) with all the settings on ultra.. i didnt crash but i did observe my temps for CPU getting over 90C a lot.
how can I determine if the power supply is failing?
only way is to install a known good working one if you have a spare that has the required wattage.
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Adam Leinss
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It ended up being heat related. I had a minute amount of dust visible as a ring showing where the fan sat on the "Radiator" for the liquid cooling. I took the whole cooler apart and dusted and used a bottle of air through the "radiator"    It amazed me how much my temperatures dropped. I was once running in the high 70s at idle and now I am sitting in the 40s. Seemed to have made all the difference in the world. Nothing has crashed or bogged down since.

Thank you for the help. I am going to save this thread because even though some of the posts didnt contribute to the resolution, the info shared was great.
Can we close this question?