Higher density LPDDR5 soldered RAM needs BIOS support.

Yes. Even though the RAM is soldered, the BIOS still needs to know how to initialize and train higher-density LPDDR5 modules for Intel 12th-gen and newer.

Intel’s memory controller isn’t plug-and-play for every density out of the box. Higher-density LPDDR5 (like 32GB per package) requires updated memory reference code (MRC) that often ships in a later BIOS revision. If the laptop came with 16GB and the manufacturer later offers a 32GB variant, that higher-density SKU almost certainly has a different BIOS version from the factory.

If you’re buying a refurb or swapping system boards, check the BIOS version first. Without the right BIOS, the machine might not boot, or it could run unstable. OEMs like Dell, Lenovo, and HP usually publish release notes that