24GB of RAM? What exactly is your RAM configuration? Ideally you want to run matching sticks in pairs or 4 matching sticks
What speed is your memory actually running at? (Task Manager>Performance>Memory)
Is your motherboard's BIOS up to date?
Are you running the latest AM4 Chipset drivers from AMD.com?
DDU past drivers if your ran an Nvidia card and all things AMD GPU wise .. reboot .. THEN install latest GPU drivers from AMD.com
Make sure you have separate power cables running to each power input on your 6800XT
What power supply make/model are you running?