fastboot flash boot boot.img fastboot flash system system.img fastboot reboot
Flashing custom firmware voids your warranty. Ensure you have a backup of the stock firmware (dump via dd if rooted). Do not flash firmwares from untrusted sources—they may contain backdoors or turn your box into a DDoS bot.
: Higher-performance variants often supporting 4K @ 60fps, 10-bit HEVC/H.265, VP9 decoding, and integrated SATA or USB 3.0 interfaces.