That's a bad analogy, because in your example, the consumer is using more of a shared resource (the available transformer, wiring, and generation capacity). In

That's a bad analogy, because in your example, the consumer is using more of a shared resource (the available transformer, wiring, and generation capacity). In the case of the driver for a local GPU card, there's no sharing. A better example would be one in which the consumer has a dedicated transformer. For instance, a small commercial building which directly receives 3-phase 13.8 kV power; these are very common around here, and these buildings have their own individual transformers to lower the voltage to 3-phase 127V/220V.