Try testing the CPU with Prime95 with the Small FFTs option for a hour.

Try testing the RAM with Memtest86 for 3 hours.

Try testing the GPU with GPUPI 3.3.3,Press Calculate then use the following settings:

Quote

(Press cancel if a message about HPET appears)

32B HWbot GPU

choose your GPU in OpenCL GPU devices

Batch size: 20M

Reduction size: 512

Then press OK to start.

Try testing the GPU with MSI Kombustor for a hour.

Tell us if you get any errors while testing.

Prime95 download page:

https://www.mersenne.org/download/

Memtest86 download page:

https://www.memtest86.com/download.htm

GPUPI 3.3.3 download page:

https://www.overclockers.at/news/gpupi-international-support-thread

MSI Kombustor download page:

https://msikombustor.com/#MSI_Kombustor_Download_for_PC