PCIe x4 and x8 cards can draw up to 25W from the motherboard's slot, while x1 cards are limited to 10W unless configured as a 'full-height' or 'high-power card' to pull the aforementioned 25W.

X1Plus is alternative firmware for the Bambu Lab X1 FDM 3D printer that was developed ... but rather runs completely from a microSD card that’s inserted into the display’s SD card reader.