Amazon.com: Official Creality 3D Printer Ender 3 Upgraded Silent Board Motherboard V4.2.7 with TMC2225 Driver Marlin 2.0.1 for Ender 3/ Ender 3 V2/ Ender 3 Pro/Ender 3 Max/Ender 5 : Industrial & Scientific
Ender 3 Pro - BTT SKR V3, Marlin 2.1.2, Input shaper, less then 30 days of use. | eBay
Install Marlin 2.0.5.3 Ender-3 Pro with intalled mainboard v1.1.5
Amazon.com: Creality Ender 3 / Pro Color Display Screen and 4.2.7 32 Bit Silent Control Board with 2021 Marlin Firmware and Easy Installation Complete Plug and Play Upgrade Kit, Guide and Mounting
Flashing Firmware to an Ender 3 Pro with a Raspberry Pi | Musings of an evil genius