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used mini pcs

Dell · 2019

Dell OptiPlex 3070 Micro

The OptiPlex 3070 Micro (2019) is Dell's entry Micro for 9th-gen Coffee Lake Refresh, and it also accepts 8th-gen chips. In the Micro chassis it runs 35 W T-series processors from Celeron up to the eight-core Core i7-9700T on an Intel H370 chipset, so there is no vPro. Dell lists two DDR4-2666 SO-DIMM slots (32 GB max), one M.2 slot for SATA or NVMe SSDs, a 2.5-inch bay, a Realtek RTL8111HSD gigabit NIC and a 65 W adapter. Video is DisplayPort 1.2 plus HDMI 1.4, with an optional VGA/DP/HDMI 2.0b port and optional serial. ServeTheHome measured just over 10 W idle and about 40 W under load on a Core i3-9100T unit. It is a sensible low-power home server. Pick the 7070 Micro if you want Intel AMT or an Intel NIC.

Good for

Badges come from the spec rules on each use page, not from guesswork.

Dell OptiPlex 3070 Micro mini PC in black, three-quarter front view showing the power button, audio jacks, two blue USB-A ports, silver Dell logo plate and diamond-lattice grille
Representative photo — AI-generated from real seller photos. Individual listings vary. How we make these →

Specs that matter used

CPU generation
Intel 8th Gen (Coffee Lake / Whiskey Lake / Kaby Lake-R), Intel 9th Gen (Coffee Lake Refresh)
CPU options
Core i3-9100T, Core i3-9300T, Core i5-9400T, Core i5-9500T, Core i7-9700T, Core i5-8500T, Pentium Gold G5420T, Celeron G4930T
Form factor
1-liter business mini
Released
2019
Memory
DDR4-2666 SO-DIMM (2400 MHz with Celeron, Pentium and Core i3), 2 slots
Max RAM (official)
32 GB
Storage
1x M.2 (Socket 3) slot for SATA or NVMe SSDs, 1x 2.5-inch SATA bay with a tool-less tray.
Ethernet
1 × 1 GbE (Realtek RTL8111HSD gigabit)
Wi-Fi
M.2 2230 WLAN slot (Socket 1); Wi-Fi card and antennas optional.
vPro / AMT
No
Cooling
Fan-cooled
Power adapter
65 W external Dell adapter (19.5 V, 3.34 A)
Measured idle draw
10 W (ServeTheHome measured 'just over 10W' idle at 120 V (and about 40 W under load) on a Core i3-9100T unit with 8 GB RAM and a 500 GB HDD.; source)
Windows 11
CPU generation is on Microsoft's supported list
Spec sources

Check before you buy

General off-lease checks (BIOS passwords, Computrace, missing drive caddies) are in the used mini PC buying checklist.

Buying guide

Which one to buy

Oct 4, 2026

235 OptiPlex 3070 Micros are listed, and most complete units run $120–180 delivered, with an i5-9500T, 8 GB and a 256 GB SSD available for about $130. Prioritise a named CPU (this model shipped with anything from a Celeron to an i7-9700T), a stated SSD, ideally NVMe, and the 65 W Dell adapter, which few titles mention. Treat 'Win 11 Pro' in a title as a claim and confirm the licence is activated. Skip the zero-feedback seller and any title whose CPU doesn't exist, such as an 'i5-900T'.

Listed now
235
For parts
0
Typical ask
$120–$180
Full range
$90–$226

Snapshot

Live on eBay right now

8 of 235 listed

Snapshot captured — listings may have ended

Delivered prices include shipping as eBay quoted it to a US address on Oct 4, 2026. Many sellers charge by distance, so your total may differ; eBay shows your exact total before you buy.

Prices and availability change daily. The full, current search on eBay shows every matching listing, including new ones since Oct 4, 2026.

See all current listings on eBay ↗eBay search

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