HMB Support: Since it lacks onboard DRAM, it uses Host Memory Buffer (HMB) technology to cache mapping tables in the system's RAM, significantly improving performance compared to traditional DRAM-less drives.

Note: Some updates will erase the drive. Check the release notes. Kingston and ADATA preserve user data; others may not.

The Silicon Motion SM2263XT is one of the most popular DRAM-less NVMe controllers on the market. Found in budget-friendly yet high-performance SSDs like the Crucial P1, Lexar NM610, and various HP or ADATA models, it relies heavily on its firmware to manage data without the help of dedicated DRAM.

Or use CrystalDiskInfo → look for “Firmware” field.