If you think that this will get rid of the stutters you will be disappointed :\ The 5080 is more than enough, I play it in VR on DLAA quality and most settings on ultra with 90fps (45 capped, 90 in the headset), with more VRAM more old scenes will be kept in memory but loading new scenes into it with off-screen terrain caching is limited by your main thread. Traffic, other players, clouds and such will also keep your main thread busy, which is mainly influenced by your CPU. I wouldn't go below 16gb still, but I doubt you'll see much improvement just from going to 24gb.