I spent last night and my day off today doing a clean Win 11 install, updating drivers, ME and BIOS to 0904. I just finished a clean install of MSFS and so far, so good. I’m getting very smooth performance in DX12 with no stutters or pop-in. I must have screwed something up with my previous build that was translating to the sim.
I’ll update after I’ve had an opportunity to put in some more time. Thank you all for your advice.