How much power does a pci e slot provide?

A standard PCIe (Peripheral Component Interconnect Express) slot provides up to 75 watts of power. This is applicable to the larger x16 slots commonly used for graphics cards. Smaller slots, like x1 or x4, provide less power, typically around 25 watts or less. Additional power connectors are often needed for high-performance components, such as GPUs, to meet their power requirements.