ASUSTOR, LOCKERSTOR, FLASHSTOR

ASUSTOR is ASUS's NAS subsidiary, and its lines take different memory. LOCKERSTOR is the multi-bay family built around hot-swap drive bays, with the current Gen3 units on DDR5 SODIMM. FLASHSTOR is the all-flash family — M.2 NVMe rather than drive bays, far higher throughput, much smaller chassis — with the Gen2 units (FS6806X, FS6812X) also on DDR5. Older AS5, AS6 and AS7 series run DDR4 or DDR3. Across all of them the choice that matters is ECC versus non-ECC: ASUSTOR's own part numbers differ by two characters (AS-16GD5 is non-ECC, AS-16GECD5 is ECC), and a unit specified for ECC will not run without it. Match the full part code, not the capacity.