Regular graphical glitches (Unstable artifacts?)

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I have no idea which part of my build is giving me these graphical glitches... I've read online that when purple/green appears it's an indicator of a bad GPU...? My exhaust case fan on the back is spoilt so I manually spin it with a stick everytime I boot up my PC (thankfully it continues spinning after that) so could it be a case of GPU being thermally throttled? Here are some screenshots for reference. Since I bought my pre-built system from a vendor I can't RMA my GPU directly from the manufacturer, and my 3-year warranty with the vendor has expired.

 

CPU: Intel i5-8400

Cooler: Intel stock air cooler

MOBO: ASRock Z370M Pro4

GPU: Nvidia Geforce GTX 1060 6GB

RAM: 1 x 8GB ADATA 2400 mhz

SSD: 120GB KLEVV NEO N600 M.2

HDD: 1TB Toshiba DT01ACA100

PSU: EVGA 450w Bronze+

OS: Windows 10 64-bit

BIOS: P1.40

 

[Pixelfie]

Could also be RAM. Since it's a single stick you can try running memtest

 

For the fan issue, try clearing CMOS

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On 12/5/2021 at 1:55 AM, Pixelfie said:

Could also be RAM. Since it's a single stick you can try running memtest

 

For the fan issue, try clearing CMOS

Hey, thanks for the reply! I've ran memtest and the RAM seems fine. As for the fan issue, I've cleared CMOS but it still isn't spinning  I guess it's just a faulty fan then.