Low-power used mini PCs for a 24/7 home server (measured idle)

A server that runs all day spends most of its time idle, so idle draw decides the running cost. Each reading below is linked to its source and configuration; drives, BIOS settings and OS change the figure.

Criteria: A cited third-party or community wall-meter idle reading whose upper bound is 15 W or less. Models without a published measurement are not listed (not measured is not the same as high). 11 of our models match. Data last reviewed 2026-09-25.

Low-power used mini PCs for a 24/7 home server (measured idle)
ModelYearCPU generationsWhy it matches
Lenovo ThinkCentre M720q Tiny20188th gen (Coffee Lake) / 9th gen (Coffee Lake Refresh)11–14 W idle (ServeTheHome; Dual-core Pentium Gold G5400T (an i5-8500T config draws somewhat more))
Lenovo ThinkCentre M75q-1 Tiny2019Ryzen 3000 (Picasso)about 11 W idle (ServeTheHome; Ryzen 5 PRO 3400GE)
HP EliteDesk 705 G4 Mini2018Ryzen 2000 (Raven Ridge)11–14 W idle (ServeTheHome; Quad-core Ryzen PRO APU)
HP EliteDesk 800 G4 Mini20188th gen (Coffee Lake)11–12 W idle (ServeTheHome; Six-core Core i5-8500T)
Dell OptiPlex 3050 Micro20177th gen (Kaby Lake) / 6th gen (Skylake)11–14 W idle (ServeTheHome; Quad-core Core i5-7500T)
Lenovo ThinkCentre M710q Tiny (verify)20177th gen (Kaby Lake) / 6th gen (Skylake)11–13 W idle (ServeTheHome; Quad-core Core i5-7500T)
HP EliteDesk 800 G2 Mini (verify)20166th gen (Skylake)11–14 W idle (ServeTheHome; Quad-core Core i5-6500T)
Lenovo ThinkCentre M75q Gen 2 Tiny2020Ryzen 4000 (Renoir)about 12 W idle (ServeTheHome; Ryzen PRO 4000-series APU)
Lenovo ThinkCentre M920q Tiny20188th gen (Coffee Lake) / 9th gen (Coffee Lake Refresh)12–15 W idle (ServeTheHome; Quad/six-core 8th-gen T-series CPU)
HP EliteDesk 800 G3 Mini (verify)20176th gen (Skylake) / 7th gen (Kaby Lake)about 12 W idle (ServeTheHome; Quad-core Core i5-7500T, 65 W adapter)
Dell OptiPlex 7070 Micro20199th gen (Coffee Lake Refresh)about 13 W idle (ServeTheHome; Six-core Core i5-9500T ("just over 13 W"))

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Something wrong or missing? Send a correction. Lists are built from each model's documented specs; models marked "verify" have fields we could not confirm from an official document.