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used mini pcs

Dell · 2021

Dell OptiPlex 7090 Micro

The OptiPlex 7090 Micro (2021) moves to Intel's Q570 chipset and takes both 10th-gen Comet Lake and 11th-gen Rocket Lake processors, as 35 W T-series chips or 65 W desktop parts up to the Core i9-11900. It is not a Tiger Lake/Iris Xe machine: graphics are Intel UHD 630 or UHD 750 depending on the CPU. Dell specifies two DDR4 SO-DIMMs up to 64 GB (up to 3200 MHz depending on CPU), two M.2 NVMe slots (one 2230/2280, one 2280), a 2.5-inch bay, an Intel I219-LM NIC with AMT, and a front 20 Gbps USB-C port. ServeTheHome measured 12-14 W idle and just over 60 W peak on a Core i5-10500T unit with the 90 W adapter. Because listings mix both CPU generations under one name, confirm which you are getting.

Good for

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

Dell OptiPlex 7090 Micro mini PC in black, three-quarter front view showing the power button, audio jacks, USB-C and blue USB-A ports, OptiPlex label and slanted-slot grille with the round Dell logo
Representative photo — AI-generated from real seller photos. Individual listings vary. How we make these →

Specs that matter used

CPU generation
Intel 10th Gen (Comet Lake / Ice Lake), Intel 11th Gen (Tiger Lake / Rocket Lake)
CPU options
Core i3-10105T, Core i5-10500T, Core i7-10700T, Core i5-11500T, Core i7-11700T, Core i9-11900T, Core i5-11500 (65 W), Core i7-11700 (65 W)
Form factor
1-liter business mini
Released
2021
Memory
DDR4 SO-DIMM, 2666/2933/3200 MHz depending on CPU, 2 slots
Max RAM (official)
64 GB
Storage
2x M.2 NVMe slots (SSD-0 takes 2230 or 2280, SSD-1 takes 2280 only) plus 1x 2.5-inch SATA bay. Dell says Gen4 SSDs run at Gen3 speed on this platform.
Ethernet
1 × 1 GbE (Intel I219-LM gigabit with Intel AMT support)
Wi-Fi
M.2 2230 WLAN slot; Dell offered Qualcomm QCA61x4a, QCA9377 or Intel Wi-Fi 6 AX201. Two rear antenna knock-outs; card and antennas optional.
vPro / AMT
Some CPU options
Cooling
Fan-cooled
Power adapter
90 W or 130 W with a 4.5 x 2.9 mm barrel for 35 W CPUs; 180 W with a 7.4 x 5.1 mm barrel for 65 W CPU and discrete-graphics configurations (Dell spec table)
Discrete GPU
Optional AMD Radeon RX 640 discrete graphics (per ServeTheHome); Dell lists two mini DisplayPort 1.4 outputs and a 180 W, 7.4 mm adapter for that build
Measured idle draw
12–14 W (ServeTheHome measured 12-14 W idle at 120 V and just over 60 W peak on a new Core i5-10500T unit (8 GB RAM, 256 GB M.2 2230 NVMe) with the 90 W adapter.; 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

121 OptiPlex 7090 Micros are listed, and most complete units sell for about $250–360 delivered, though a 10th-gen i5-10500T with 16 GB and an SSD starts at about $210. Check the generation: 10th-gen (i5-10500T, i7-10700T) and 11th-gen (i5-11500T, i7-11700T) units share the name, and 11th gen is the better pick at similar money. Match the adapter to the CPU: T-series chips use Dell's 90 W or 130 W adapter, while 65 W non-T chips need the 180 W adapter with the 7.4 mm barrel. Titles reading 'up to 64GB RAM & 2TB SSD' are configure-to-order base prices, not 64 GB units.

Listed now
121
For parts
0
Typical ask
$250–$360
Full range
$200–$549

Snapshot

Live on eBay right now

8 of 121 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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