DGX Spark power consumption and running cost
The Spark plugs into an ordinary wall socket, no special circuit required, but "ordinary socket" is not the same as "free to run". This page has the published power figures and a formula for turning them into a real electricity cost, using your own local rate rather than a number we picked for you.
The published power figures
240 W is NVIDIA's own specification for whole-system peak power draw, listed on GPUwerk's DGX Spark hardware page. That figure covers the entire machine at its ceiling, not just the accelerator. GPUwerk's buying guide breaks it down further: the GB10 superchip itself is rated around 140 W TDP, and the rest of the 240 W budget covers the ConnectX-7 networking ports, the NVMe storage and USB-C provisioning. The same guide also notes NVIDIA's own clarification that 240 W is a whole-system peak figure, not a sustained SoC number, and flags owner reports on NVIDIA's developer forums describing idle draw around 40 W and some forum posts describing the box topping out nearer 100 W under load, both explicitly labeled as unverified anecdotes rather than instrumented measurements. Use 240 W for sizing a circuit and for a worst-case cost estimate; expect typical draw to run lower.
Working out your own electricity cost
Electricity prices vary enormously by country, by supplier and by time of day, and GPUwerk is not going to quote a single "current average" figure and let it go stale on this page. The formula is simple enough to apply with your own numbers:
cost per hour = (watts ÷ 1000) × price per kWh
# worked example at an illustrative rate, not a real average
240 W ÷ 1000 = 0.24 kWh per hour at peak
0.24 kWh × €0.30/kWh (illustrative) = €0.072 per hour at peak
That illustrative €0.072-per-hour figure is deliberately a placeholder, not a claim about what electricity costs where you live. Pull your own per-kWh rate from a recent utility bill and multiply it by 0.24 (or by whatever fraction of 240 W the machine actually draws under your workload, which GPUwerk's buying guide's forum reports suggest is often well under peak) to get a number that means something for your circumstances. Electricity rates differ enough between countries, and even between regions of the same country, that a single sitewide number would be misleading regardless of how recently it was updated.
Running the peak figure across a full day and month gives a sense of scale once you plug in a real rate:
| Duration | Energy at 240 W peak | Cost at your rate |
|---|---|---|
| 1 hour | 0.24 kWh | 0.24 × your €/kWh |
| 24 hours | 5.76 kWh | 5.76 × your €/kWh |
| 730 hours (1 month, 24/7) | 175.2 kWh | 175.2 × your €/kWh |
All figures use the 240 W peak spec as the input; actual draw under typical use is very likely lower, per the forum reports cited in GPUwerk's buying guide, so treat this table as a ceiling, not an expectation.
Renting instead of running your own
GPUwerk's per-minute rate of $0.79/hour includes electricity, cooling and everything else that keeps a node running, so if the point of this exercise is deciding whether to buy hardware, the rental rate is a useful upper bound to compare a purchase's total cost of ownership against, power included. The rent vs buy page covers that comparison with a calculator for your own usage pattern.
A first engagement can help if you want a hand sizing a real deployment's power and cost picture rather than a spreadsheet exercise.