Upgraded Silent 1.1.5 Mainboard for Ender 3 Pro Silent function The TMC driver is super quiet! Bootloader installed (ISP/USB Arduino) Suitable for Ender-3/Ender-3 Pro/Ender-5 Firmware 1.1.8 comes pre-installed on this board This new upgraded silent motherboard is currently not pre-installed on our Ender 3 Pro printers. At this point, the silent motherboard is a separate upgrade for all 3 Ender's. Ender 3 / Ender 3 Pro installation video: PLAY NOW