The PI226 and PI336 are the world's smallest mini PCs, but that does not mean their performance is lacking. These are powered by Intel's 6.5 W TDP Celeron 4000 and 4100 SoCs that integrate the UHD 600 iGPUs, and come with 4 GB of LPDDR4, plus 32 GB eMMC of internal storage.
https://www.notebookcheck.net/Zotac-showcases-credit-card-pico-PCs-powered-by-Gemini-Lake-CPUs.278946.0.html