Does Darkbloom cover its electricity cost?
Updated
Short answer: on most Pro and Max Macs the electricity is a small cost next to the base reward. On Ultra Macs that serve for long stretches, at high electricity prices, it can take a real share of what the Mac earns. The figures below come from Apple’s published power data and from provider reports in September 2026. The prices are examples: use your own rate.
Work out your own cost
Cost per day = watts × 24 ÷ 1,000 × your price per kWh. Example: a Mac averaging 200 W uses 200 × 24 ÷ 1,000 = 4.8 kWh a day, which is $1.44 at $0.30 per kWh. Use the Mac’s average draw over a whole day, not its peak. A plug-in power meter gives you that number directly.
Apple’s published power figures
Apple measures power at the wall. “Idle” is only Finder open; “Max” is a compute-intensive test that maximizes processor usage. Max is a ceiling, not what a serving Mac draws all day: most of the day a Darkbloom Mac waits for requests, closer to idle. The cost columns show the worst case, a Mac at Apple’s maximum for 24 hours, at two example prices.
| Mac | Idle | Max | kWh a day at max | At $0.15/kWh | At $0.30/kWh |
|---|---|---|---|---|---|
| Mac mini, M4 Pro | 5 W | 140 W | 3.4 | $0.50 | $1.01 |
| Mac mini, M5 Pro | 6 W | 145 W | 3.5 | $0.52 | $1.04 |
| Mac Studio, M1 Max | 11 W | 115 W | 2.8 | $0.41 | $0.83 |
| Mac Studio, M2 Max | 9 W | 145 W | 3.5 | $0.52 | $1.04 |
| Mac Studio, M4 Max | 6 W | 145 W | 3.5 | $0.52 | $1.04 |
| Mac Studio, M5 Max | 7 W | 200 W | 4.8 | $0.72 | $1.44 |
| Mac Studio, M1 Ultra | 13 W | 215 W | 5.2 | $0.77 | $1.55 |
| Mac Studio, M3 Ultra | 9 W | 270 W | 6.5 | $0.97 | $1.94 |
| Mac Studio, M2 Ultra | 10 W | 295 W | 7.1 | $1.06 | $2.12 |
| Mac Studio, M5 Ultra | 9 W | 385 W | 9.2 | $1.39 | $2.77 |
What providers have measured
- An M5 Max Mac serving Darkbloom used about 1.4 kWh in 24 hours (reported in the Darkbloom Slack). That is an average of about 60 W, roughly $0.22 a day at $0.15 per kWh and $0.43 at $0.30.
- An M3 Ultra owner reported about 200 W while serving continuously (Reddit, September 2026). All day, that is 4.8 kWh: $0.72 at $0.15 per kWh, $1.44 at $0.30.
- An M3 Ultra 512 GB owner measured about 250 W at most at the wall (Hacker News). All day at that level would be 6 kWh: $0.90 or $1.80.
- MacBook Pro: Apple doesn’t publish wall power for it. Its adapter sets a ceiling: 70 W or 96 W for the 14-inch and 140 W for the 16-inch. 96 W all day is about 2.3 kWh, $0.35–0.69 at the example prices.
Compare it with what the Mac earns
- The base reward target is $0.33 a day for a 24 GB Mac, $0.53 for 48 GB, $0.60 for 64 GB, $0.87 for 128 GB and $1.33 for 512 GB. It comes from a shared pool, so it is a target, not a guarantee.
- Many Macs earn mostly base reward. The network had far more capacity than demand: about 5–7% of it was in use on September 29, 2026, and most of the work went to Macs with 96 GB or more. A public report from a 96 GB M2 Max found 99.8% of an earnings sample was base reward, about $0.73 a day.
- A Mac that mostly waits draws little more than idle, so its cost is well below the table’s worst case. A Mac that serves for hours draws more, but it is also earning token pay in those hours.
- The provider keeps the Mac from sleeping while it serves. Compare against what the Mac would use awake and idle, not switched off.
The honest answer
- Pro and Max Macs: the electricity is usually a small share of the base reward alone, at typical prices.
- Ultra Macs: at $0.30 per kWh and long serving hours, electricity can use up a large share of the base reward. It pays off only if the Mac wins enough token work on top.
- Laptops: power is small, but heat, battery wear and sleep cost more than the electricity.
- Don’t rely on anyone else’s numbers, including these. Measure your Mac’s kWh with a plug meter for a few days and compare it with its confirmed earnings per hour over the same days.
Sources
- Mac Studio power consumption and thermal output: support.apple.com/en-us/102027
- Mac mini power consumption and thermal output: support.apple.com/en-us/103253
- MacBook Pro tech specs (power adapters): apple.com/macbook-pro/specs/
- Darkbloom pricing model (base rewards): github.com/Layr-Labs/d-inference/blob/master/docs/reference/pricing-model.md
- Darkbloom hardware requirements (sleep prevention): github.com/Layr-Labs/d-inference/blob/master/docs/provider/hardware-requirements.md
- Network figures: Darkbloom’s public /v1/stats endpoint, September 29, 2026.
- Provider reports in the Darkbloom Slack, on Reddit and on Hacker News, September 2026, described without names. 96 GB report: reddit.com/r/DarkbloomProviders/comments/1wrrwou
How BloomGauge helps
BloomGauge shows your Mac’s confirmed earnings per model and hour, with base rewards separate from token earnings. Put a day of those next to a day of plug-meter readings and you know whether Darkbloom covers its electricity on your Mac.
Questions
How much electricity does a Mac use running Darkbloom?
It depends on the Mac and how much it serves. Apple publishes idle and maximum power for Mac Studio and Mac mini: for recent Pro, Max and Ultra models that is 5–13 W idle and 115–385 W at maximum. Providers have reported about 1.4 kWh a day on an M5 Max Mac and about 200 W while serving continuously on an M3 Ultra.
Does Darkbloom pay more than the electricity costs?
On most Pro and Max Macs, yes: electricity is usually well under the base reward of $0.53–0.87 a day for 48–128 GB Macs. On Ultra Macs at high electricity prices, power can use up much of the base reward, so it depends on how much token work the Mac wins. Measure your own kWh and earnings.
How do I calculate the electricity cost of Darkbloom?
Multiply the Mac’s average watts by 24, divide by 1,000 and multiply by your price per kWh. For example, 200 W is 4.8 kWh a day, $1.44 at $0.30 per kWh. A plug-in power meter gives you the real average.
Related
- Is Darkbloom worth it on a Mac?
- How Darkbloom pays Mac providers: token earnings and base rewards
- Darkbloom on a Mac Studio: what Max and Ultra Macs earn
- Darkbloom earnings calculator vs. what Macs actually earn
Updated 2026-09-29. Still stuck? Ask in #bloomgauge on the Darkbloom Slack or contact us. BloomGauge is independent and not affiliated with Darkbloom.