The basics of all home brewery, is to taste before, and then adjust.
So, download Intels LinPack
memory and CPU stress test.
It is very demanding, so make sure that Your CPU cooler is working well.
1. There are a special edition which I recommend of this
Intel LinPack called
LinX
Download LinX http

/linx.en.lo4d.com/
2. It does not matter where You put it, it contains no installation files, just name a directory like LinX and save it there.
3. You will also need too keep an close eye to the temperatures and therefore
download and
install HWMonitor (free)
http
/www.cpuid.com/softwares/hwmonitor.html
To the left download the free version.
Obs! during installation make sure that you untick any third part s/w. I always recommend this procedure no matter what on any free s/w. Ok.
Then, in the HWmonitor window there are three columns:
Value= shows the actual readings from all the sensors including temperatures and voltage
Min and max speaks for itself.
4. restart your computer.
5. Wait for at least 3-4 minutes until the system stabilize itself.
6. Start HwMonitor, move the window to the right side of the monitor, adjust the size.
Example:
7. Start LinX
8. In the window, move it to the left side and adjust.
9. LinX and this is just an example from my old SandyBridge 2600K OC, but the principle is the very same:
The menu looks like this:
10. Then next step:
You will to have to click in the upper area, where it says: Memory :
All
It will then use the remaining memory for the test.
11. Then chose
20 times and click Run.
12. Test is very demanding and do no even touch Your mouse nor keyboard, but keep close control on the temperatures.
And make sure before, that your monitor will not switch off - due to energy saving things. Turn of all such - before.
13. When everything is done, then in the right column where it says 'Residual (Norm) all numbers must be equal to The numbers in the that column and to the left where it says Residual all numbers must be equal in that column.
If there is a problem, an error with red text will occur, shut down the PC, restart and Enter BIOS-setup and lower the timings, first try to lower their speed (frequency).
15. Run the test again.
Good luck from Sweden