have you tried installing AMD Blockchain Driver. : Radeon Software Crimson ReLive Edition Beta for Blockchain Compute Release Notes .
Might work better with your Ryzen CPU.
Here is the latest Ryzen Master from AMD Download page for your CPU: AMD Ryzen™ Threadripper™ 2990WX Drivers & Support | AMD
NOTE: I know very little of Mining software and drivers. But I know AMD has it own driver for Mining purposes as per above link.
admiralgreen, please see this thread and watch the Level1Techs video. You may want to consider disabling core 0. I know little about mining, but I would at least suggest you consider elstaci's driver link. Please let us hear what you learn on both. Enjoy, John.