Had the same issue on demanding games like RDR2 here is what I did to to fix the issue
Problem : System crash
Solution : Set graphics setting from Ultra to high and set it at DirectX12 as some games are by default set at Vulkan
Intermittent fan noise :
Solution :
Step 1
- In AMD settings Go to Performance Click on Tuning ,
Step 2
-Set fan Tuning to Custom Under Fan Tunning
Step 3
Deactivate Zero RPM
I don't know why AMD doesn't post this as all the other solutions are a waste of time if some ones CPU PSU ect wasn't working properly they would know long before even installing a new GPU