A device capable of self-detecting and self-allocating additional power and associated method are disclosed. The device includes a first module to route current from first power pins to a voltage rail having the first voltage level. The device includes a second module coupled to second power pins associated with a second voltage level. The second module routes current from the second power pins to the voltage rail having the first voltage level via a connecting voltage rail. The method includes determining, by the device, whether or not a presence of unused power pins is detected. Based on the detection, the method includes calculating a total amount of available additional power, repurposing the unused power pins as actively used power pins, and updating a power budget value based on the total amount of available additional power. The device may dynamically allocate power to accelerators based on a power allocation table and the power budget value.