does running local AI use a lot of electricity? The honest numbers

A common worry before going local: will my power bill explode? The honest answer is no for how most people use it — but here are the real numbers so… Aliteq Lena Fischer · AI & Local Compute Editor

You only draw big power while generating — idle draw is a small fraction. On-demand use = pennies.

RTX 4090 flat-out 24/7: ~$50-70/month (~$52 at $0.12/kWh). That's the worst case.

Mid-range cards 24/7: RTX 4080 ~$30/mo, RTX 4070 Ti ~$26/mo.

Efficient hardware: an Apple Mac is ~$2-3/month even with regular use.

Your rate matters most — US average ~$0.17/kWh; Germany ~2×; time-of-use plans swing ~2×.

Cut it further: power-limit your GPU for ~20% less draw at ~1% less speed.

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