Please uninstall everything of AMD using Display Driver Uninstaller and install new drivers from AMD. Be sure to install as less as possible software using custom/advanced options.
Run Furmark to test your GPU. Furmark tutorial
Run Furmark for around 30 minutes
Your GPU temperatures will rise quickly while Furmark is running. Keep a keen eye on them and abort the test if temperatures rise too high
Run MemTest86+ to analyse your RAM. MemTest86+ - Test RAM - Windows 10 Forums
MemTest86+ needs to be run for at least 8 complete passes
for conclusive results. Set it running before you go to bed and leave it overnight. We're looking for zero
errors here. Even a single error will indicate RAM failure.
If errors show up you can stop the test, remove all sticks but 1 and test this single stick in each slot for 8 passes or until errors show, switch sticks and repeat.
If errors show up and you see them a lot later, no problem, the errors don't affect the test.