Devices with 2 GB or 3 GB of RAM see no benefit from a 64-bit OS (which consumes more memory for its own structures). The 32-bit version runs more efficiently on such constrained hardware.
The defining characteristic of 32-bit Windows is its memory ceiling. It can only address approximately , regardless of how much physical memory is installed. This limitation stems from 32-bit addressing math ( 2322 to the 32nd power windows 10 32 bits iso