Specs & Power Consumption: Dell OptiPlex 3070 Micro (i3-9100T)

Verified data Intel Core i3-9100T

Dell OptiPlex 3070 Micro (i3-9100T): 10W idle and 40W under load (measured), 1x 1GbE, up to 32 GB RAM. VESA mount behind your monitor.

Technical specifications

Idle [source]10 W

Under load [source]40 W

Estimated 24/7 average16.0 W

Yearly cost (€0.25/kWh)35.04 €

Average based on 80% of the time at idle and 20% under load, running 24/7: 140 kWh/year. Adjust the inputs to match your usage:

Energy: 140 kWh/year · Cost: 35.04 €/year (2.92 €/month)

Footprint 182 × 178 mm, 36 mm tall (about 1.17 litres).
Supports VESA mounting (75/100 mm bracket): attach it behind your monitor or under the desk to free up space. Keep the front USB ports and power button reachable.
When VESA-mounted, keep the vents clear: leave at least 1-2 cm between the case and the monitor.

Active cooling: nearly silent at idle, the fan is audible under sustained load.
Clean dust from the vents every 6-12 months to keep temperatures and power draw low.

See the current price and available configurations for Dell OptiPlex 3070 Micro (i3-9100T).

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Idle power: 10 W — servethehome.com (measured review, checked on 2026-11-06)
Load power: 40 W — servethehome.com (measured review, checked on 2026-11-06)
Dimensions: 182 × 178 × 36 mm — dell.com (official source, checked on 2026-11-06)
Max RAM: 32 GB — dell.com (official source, checked on 2026-11-06)
Network ports: 1x 1GbE — dl.dell.com (official source, checked on 2026-11-06)

Unverified values*: VESA support.

* Value not verified by a reliable source: collected with an AI assistant and not yet confirmed by an official spec sheet or a measurement.

Real-world power draw varies with OS, RAM, drives, peripherals and BIOS settings.