We're going to need more information. Please list your specs like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS: version for Windows 10
include the age of your PSU as well.
Intel(R) Core(TM) i5-7400 CPU @ 3.00GHz
Asus H110M-R
8 GB DDR4-2400 DDR4
KINGSTON SA400S37120G (111 GB) SSD
WDC WD10EZEX-00WN4A0 (931 GB)
Palit GTX 1060 StormX 3GB
Enermax PRO82+ 385W (minimum of 3yrs old)
Windows 10 Enterprise LTSC 1809
I wouldn't say it's PSU 'cause whenever there were those artifacts GPU was nowhere near maximum load or high temps.