I can 100% confirm that the following fixed my issues on AMD at least. Went back to driver 20.4.1 my fps on tangled shore and braytech went from 45 to 90-100. Any driver after that up until today I have tested all of them they all have low fps. I do honestly think the issue lies with windows version 2004 I havent tested build 1909, the reason for comming to this conclusion is if you read the patch notes for driver 20.5.1( first driver to have issues in beyond light) it says added support for windows build 2004 and nothing else realy was in that driver. i will add my dxdiag but i urge Nvidia users who are having the same issue try and find A driver that did not have the windows build 2004 optimizations and check if your game runs better. Cheers hope this helps @bungie ! https://pastebin.com/TQFLRWzb