PINE64 has launched the Ox4, a miniature single-board computer (SBC) that relies on a RISC-V processor. The PINE64 Ox64 is available from US$6 in 16 MB and 128 MB variants, with the latter offering microSD card expansion too.https://www.notebookcheck.net/PINE64-Ox64-Compact-single-board-computer-released-in-two-variants-from-US-6-with-RISC-V-processor.672856.0.html
The board have 16 and 128 Mbit, not 16and 128 Mbyte of xspi flash memory and 64MB of RAM