BIGTREETECH SKR 3 Control Board 32Bit New Upgrade Silent Board Support Marlin &???Using 32-bit ARM Cortex-M7 series STM32H743VIT6 main control chip with a main frequency of 480MHz, the performance is greatly improved. Supports use of Marlin & Klipper firmware. ???The power supply chip adopts TPS5450-5A, which supports DC12/24V power input; the output current of the chip is up to 5A, and the peak value is up to 6A, which perfectly supports the power supply of Raspberry Pi. ???The CNC fans can realize 24V, 12V, 5V voltage selection through the external power supply module, which saves the operation of the customer's external transformer module and reduces the probability of damage to the motherboard. ???On-board high-performance MOSFET, increase the protection circuit of the thermistor part, to avoid damage to the main control chip due to leakage of the hot bed or heating rod. ???The thermistor can select the pull-up resistance value through the jumper, in this way, it supports PT1000 without external module, which is convenient for customers to use DIY.