BIGTREETECH SKR V1.4 Control Board 32bit, Compatible TFT35/TFT70, Support TMC2209/TMC5160 Review (2026)

Who this board fits

The SKR V1.4 is aimed at 3D printer owners who want to move from an older 8-bit mainboard to 32-bit control, most often to run quieter stepper drivers or unlock features that stock 8-bit boards cannot support well. BIGTREETECH's own wiki and multiple retailer listings describe it as an upgrade board built around an ARM Cortex-M3 processor, compatible with a wide range of driver types and touchscreen displays. That makes it a good fit for people already comfortable flashing firmware and rewiring a printer's electronics bay. It is a poor fit for beginners wanting a plug-and-play upgrade, since the board ships bare, without drivers or a screen included.

Core specifications

BIGTREETECH's wiki lists board dimensions of 110 by 85mm with a 102 by 76mm mounting pattern, built around an ARM Cortex-M3 CPU running at 100MHz on the LPC1768 chip, with a faster Turbo variant using the LPC1769 at 120MHz. It accepts DC12V to DC24V input at 5 to 15A and has five motor driver slots covering X, Y, Z, E0 and E1 axes, each supporting SPI, UART, or STEP/DIR driver modes with up to 256 microstep subdivisions. Three temperature sensor channels are included, along with expansion ports for accessories like BLTouch probes, relay modules, and UPS boards, and an ESP-01S Wi-Fi module slot for wireless connectivity add-ons.

Driver and display compatibility

The board supports a wide range of stepper drivers according to BIGTREETECH's wiki, including TMC5161, TMC5160, TMC2209, TMC2225, TMC2208, TMC2130, ST820, LV8729, DRV8825, and A4988, giving builders flexibility to choose between quiet UART-mode drivers or higher-current SPI-mode drivers depending on the motors being driven. Display support covers 2.4, 2.8, and 3.5-inch color touchscreens in addition to LCD2004 and LCD12864 character displays, and the Amazon listing specifically notes compatibility with BIGTREETECH's TFT35 and TFT70 touchscreens. None of these drivers or screens ship with the bare board, so builders need to already own or separately purchase compatible parts before installing it.

Installing it as an upgrade

Swapping in the SKR V1.4 means more than plugging in a new board: it typically requires flashing 32-bit firmware such as Marlin 2.0, reconfiguring driver current and microstepping settings to match the new drivers, and carefully rewiring stepper motors, endstops, thermistors, and the heated bed to the new connector layout. BIGTREETECH's wiki confirms firmware can be updated via SD card, and the open-source Marlin 2.0 base gives experienced users room to tune motion settings that stock 8-bit boards cannot expose. Anyone uncomfortable with firmware compilation or careful rewiring should budget extra time, or consider a simpler pre-flashed board instead.

Bottom line

The SKR V1.4 is a flexible, well documented 32-bit upgrade path for printers still running older 8-bit electronics, with broad driver and display compatibility that covers most common upgrade paths builders are likely to want. Its value depends heavily on already owning or separately budgeting for stepper drivers and a touchscreen, since the bare board alone does not include either one in the box. Builders comfortable with firmware flashing and careful printer wiring will get a genuinely more capable, quieter, and more configurable control system out of it; anyone wanting a simpler drop-in replacement should instead look for a board that bundles drivers and a screen together from the start.

Frequently asked questions