High‑end PC teardown detail

A flashy custom PC build on X did something most PC porn never does. It treated a dream machine as a pile of matter. The post started with familiar status symbols: Intel’s Core Ultra 9 285K, a 24-core Arrow Lake desktop chip; ASUS’s $999 ROG Maximus Z890 Extreme motherboard; an RTX 5070 Ti with 16GB of GDDR7; fast Corsair DDR5-7200 memory; Samsung NVMe drives; and a pair of 8TB Seagate hard drives. Those parts are real, current high-end components, not made-up spec-sheet bait (intel.com, rog.asus.com, nvidia.com, corsair.com, samsung.com, seagate.com). Then the builder did the interesting part and traced the minerals inside them (x.com). That shift matters because modern PCs are usually discussed as abstractions. More frames. More cores. More terabytes. The X thread turned the machine back into hardware in the literal sense. It counted neodymium-iron-boron magnets across fans and hard drives and estimated a total of 86 to 114 grams of NdFeB in the system, including roughly 18 to 24 grams of neodymium, 4 to 6 grams of praseodymium, and 1 to 1.5 grams of dysprosium (x.com). Those numbers are not an industry standard bill of materials, and they should be read as a careful estimate, not a lab measurement. But the anatomy is right. The hard drives are the clearest example. A conventional 3.5-inch HDD contains two strong neodymium magnets near the actuator arm, the mechanism that moves the read-write heads across the platters (makezine.com, petervis.com). In other words, even in a build full of bleeding-edge silicon, a lot of the rare-earth mass may sit inside old-fashioned spinning storage. That is a useful corrective. The minerals story of computing is not only about chips. But the chips pull in a different set of bottlenecks. Gallium is used in compound semiconductors and high-performance electronics. Germanium matters for fiber optics, infrared applications, and some semiconductor uses. Indium is essential for indium tin oxide, the transparent conductive layer used in displays and touch interfaces. The U.S. Department of Energy lists gallium, neodymium, praseodymium, and dysprosium among critical materials for energy because they combine supply risk with strategic importance (energy.gov). The U.S. Geological Survey’s 2025 summaries make the dependence even plainer: the United States imported 80 percent of the rare earths it used in 2024, much of that embedded in finished goods such as permanent magnets (usgs.gov, pubs.usgs.gov). China sits at the center of several of those supply chains. USGS data cited by CSIS says China produced 98 percent of the world’s low-purity gallium in 2024, while USITC notes China was already producing around 60 percent of global germanium and close to 90 percent of gallium in 2022 (csis.org, usitc.gov). Beijing has also tightened export controls on several critical minerals since 2023, turning what used to look like obscure materials trivia into an industrial choke point (orfamerica.org, ui.se). That is the real value of the teardown. It makes the supply chain visible at desktop scale. A top-end PC is easy to admire as performance. It is harder, and more honest, to see it as a compact warehouse of specialty metals, permanent magnets, refined silicon, copper, aluminum, and glass. The X post did not prove that one gaming rig will move commodity markets. It showed something simpler and truer. A machine built for ray tracing and video exports also contains two old-school hard-drive magnets, a handful of heavy rare earths, and a supply chain that runs straight through the most contested parts of the global minerals trade (x.com, pubs.usgs.gov).