AMD demos Ryzen 9 5900X prototype with added 3D V-Cache AMD / TSMC's 3D stacking shown to boost game performance by 15 per cent on average. Read more. Internet: Re: AMD demos Ryzen 9 5900X prototype with added 3D V-Cache Both AMD and Intel have talked about the use of such stacking,but the bigger issue is going to be cooling each layer sufficiently. Is the extra cache on top of the existing cache locations on the chiplet?? It would make sense of the copper connection layer to be over the cores?? I might not be serious. Originally Posted by CAT-THE-FIFTH Both AMD and Intel have talked about the use of such stacking,but the bigger issue is going to be cooling each layer sufficiently. Is the extra cache on top of the existing cache locations on the chiplet?? It would make sense of the copper connection layer to be over the cores??That's what the picture seems to show - the CCDs remain single layer and covered only by a structural substrate (that should conduct thermally), so as long as the caches themselves don't generate huge heat (and I don't think they do) then it should be fine.