The Ryzen 7 5800X3D is AMD’s first consumer outing for its 3D V-cache technology, which adds another 64MB of L3 cache to its chips by physically mounting the cache on top of an existing CPU. The original CPU has been shaved down slightly to make room for this cache, to ensure that the overall package looks like any other Zen 3 CPU. This means it’ll work with existing coolers on existing motherboards. All good so far.

There is a downside to adding this cache though, and that is that AMD has had to disable overclocking on the 5800X3D—indeed it’s something Robert Hallock confirmed a month ago. This is because the frequency and voltages are so intrinsically tied to how this cache works that any tweaking of the CPU’s settings can upset the timings and throw the whole thing off. 





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