what is the rest of your PC specs?
What make/model 1k PSU are you running?
Make sure you are running separate power cables to each power input on your GPU
IF you are using any cable extenders inside your case, try removing them and running power directly from PSU to motherboards/GPU and see if that helps
IF you are using a PCIe Riser cable , try plugging the GPU directly into your motherboard and see if issue persists
Run DDU and remove all AMD past and current GPU drivers. IF you ran an Nvidia card previously, be sure to remove all things Nvidia with the DDU program as well
Make sure you Windows install is up to date
Make sure you are running the latest Chipset Drivers for your setup. Go to Intel.com and run their driver update utility if Intel. Go to AMD.com and get latest AM4 chipset drivers and install if AMD
Make sure your motherboards BIOS is up to date