eMMC (micro)SD card

Use eMMC ICs in SD or microSD card readers

What is it?

These PCBs contain eMMC storage ICs, which are electrically compatible with SD and microSD interfaces.
They use a different protocol and (depending on the type of eMMC IC used) can be more reliable and faster.

Many (but not all!) SD card slots/readers can also handle eMMC.

These adapters can be used in devices like Raspberry Pis, APUs, etc. to provide stable eMMC storage through the SD slot.

SD version

SD card PCB with eMMC flash IC SD card PCB, eMMC-SD 8GB

microSD version

Raspberry Pi 4, with eMMC microSD card PCB eMMC microSD card

Benchmark (SD version, 2015 MBP)

AmorphousDiskMark, showing 45 MByte/s read/write speeds

Installed in an apu2

APU2, with eMMC SD card installed