With the announcement of AMD Ryzen 7000X3D-series chips at CES 2023, a lot of attention has been paid to what the new stackable cache technology can bring to Zen 4 processors. According to a new teardown of the Radeon RX 7900 XT, there is reason to hope that this same technology will be making its way to a graphics card near you. What else can you see? A linear array of "spots" that look remarkably like the keep out zones on X3D, and that are on the same 17-18 um pitch. Could they be considering stacked MCD functionality (or maybe they're something else)? January 27, 2023 See more Tom Wassick, a self-described "semiconductor packaging engineering professional", tore down the new Radeon RX 7900 XT to do a deep dive into its guts using infrared imaging. He says the same kind of 3D V-cache connections used for the AMD Ryzen 5800X3D exist on the Radeon RX 7900 XT's MCD die, though there is a blank piece of silicon where a compute-capable die could go. ...