Computer underperforming and somewhat unstable

Jan 10, 2019
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0
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Specs

Samsung SSD 850 EVO 1 TB
MSI Z170A PC MATE
NVIDIA GeForce GTX 1080
i7-6700k
Ballistix Sport 16GB Kit (8GBx2) DDR4 2400MHz (PC4-19200) DIMM
EVGA SuperNOVA 750 B1, 80+ BRONZE 750W

Main Issue: Underperformance and crashes most likely due to processor

Description: My PC is showing signs of instability and performance drops from what is normal for the past few months. The CPU seems to run hotter and hotter the longer it's on a game, at one point I recall it reaching 80+C sustained during a gaming session. Sometimes when gaming my computer will inexplicably crash as well. On top of that I've ran benchmark tests that say my PC is good, but when I attempted to run an extended stress test on the CPU my PC froze 45 minutes in. The temperatures of the CPU would jump back and forth from mid to high 50s to mid to high 60s celsius and peaking at low 70s during it according to Intel Extreme Tuning Utility. My idle temperature (sub 3% usage) fluctuates from 28-34C.
I have reapplied thermal paste and checked to see if the heat sink fan is spinning properly, but no fix to the issue. I remember I started noticing issues a few months back after a clean install of drivers, after which my PC could only run games in 1080p instead of 4k and they ran a bit worse, but I'm not sure if the 2 problems are related.
I don't know anyone who would allow me to use their processor to test things so I'm not sure what to do next. I don't want to buy a new processor/heat sink only to discover that the hardware wasn't to blame.

If I can provide anymore information or provide it in a better way please let me know.
 
Jan 10, 2019
3
0
10

Ballistix Sport 16GB Kit (8GBx2) DDR4 2400MHz (PC4-19200) DIMM

as for power supply

EVGA SuperNOVA 750 B1, 80+ BRONZE 750W

will add both of these to the spec list.