The amount of memory available for the cache varies based on other things that are going on? Just a guess.Why is the streaming falling down on smaller caches? What's the assumption for virtualised textures that's wrong, or at least where the worst-case scenario means the standard caching fails? Virtual textures should hit a perfect set of predictable operating parameters.
Has anyone tested 8GB cards with framegen on? I love DLSS framegen but I've noticed it needs a decent chunk of VRAM which has caused problems even on my 4070 in some games.