The Magic of 3D V-Cache – AMD Ryzen 7 5800X3D Review

The Magic of 3D V-Cache РAMD Ryzen 7 5800X3D Review The AMD Ryzen 7 5800-X3D processor is the talk of the town of these day.

AMD’s 8-core “David” against the 16-core Intel Alder Lake “Goliath.” The technology behind it, 3D Vertical Cache, was announced way back at Computex-2021, and it’s finally here, almost a year later.

The Ryzen-7 5800X3D is AMD doing to Intel what it did to AMD a couple of years ago and the 9th Gen Intel Core had lost multi-threaded performance leadership to AMD’s “Zen-2” Ryzen 3000 series, so Intel created the Core-i9-9900KS to stamp its dominance on the gaming performance space, banking heavily on the slight IPC edge its Skylake cores still had and their ability has run at 5.00 GHz all-core.

The “Zen-3” CPU core has lost the IPC edge to Intel’s new Golden Cove performance core (P core) powering the 12th-Gen Core Alder Lake lineup, so running a 5800-X at insane clock speeds at the expense of efficiency and throwing out the 105W TDP would have meant AMD repeating a long line of “Black Edition” SKUs, reflecting badly on the engineering prowess AMD built up over the past couple of years.

The company had to do something different at all, which it has by including 3D-Vertical Cache.


AMD claims that Zen-3, when paired with a highly lubricated memory pipeline, will enjoy a significant performance gain without having to dial up clock speeds (in effect (TDP)). This is accomplished by tripling the amount of L3-cache (last level cache).

A loosely analogous engineering feat by AMD, the Infinity Cache memory on its RDNA-2 graphics processors with a “small” (17 to 128MB) on-die cache operating at high speeds, could let AMD even narrow the GDDR-6 memory bus widths generation-on-generation. Anyway, back to the 3D Vertical Cache and Zen-3.



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