Ever since I switched my 4070S with a 7900XTX (12 GB → 24 GB), and have upgraded from 32 GB to 64 GB RAM I have zero issues with memory overflow and the performance is okay-ish (still micro-stutters here and there). Since Sim Update 2 and the implementation of FSR 3.1 I can achieve 100+ fps in native 4K TAA + FSR FrameGen. Fenix Aircraft at iniBuilds’ KJFK runs butter. At iniBuilds’ EGLL I experience constant micro-stutters, though all terminal at high detail is deactivated.
Edit: Running on a 5800X3D with VRR 4K screen, Ultra/High mixed settings. TLOD/OLOD at 150