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Small black fanless mini PC with honeycomb vents and VESA mount

ZOTAC

ZOTAC ZBOX-CI331NANO-U Intel N5100 barebone mini PC

SKU CH-NRR2-2YD6W MPN ZBOX-CI331NANO-U

Fanless barebone with Intel Celeron N5100, UHD Graphics, triple 4K 60 Hz outputs, dual Gigabit LAN, Wi-Fi 5, Bluetooth 5.0, and dual DDR4 SO-DIMM slots

  • RAM slots2 × 260Pin SO-DIMM
  • Supported memoryDDR4 2933/2666
  • Maximum supported memory16 GB
  • SATA ports1 x SATA 6.0Gb/s
  • Built-in graphicsIntel UHD Graphics
  • Channel count8 Channel
  • Fanless design runs completely silent with no moving parts
  • Intel Celeron N5100 quad-core processor reaches 2.8 GHz burst speed
  • Triple 4K display output via HDMI 2.0b, DisplayPort 1.2 and VGA at 60 Hz
  • Dual Gigabit LAN plus WiFi 5 and Bluetooth 5.0 for flexible connectivity
  • Supports up to 16 GB DDR4 2933 memory in two SO-DIMM slots

Silent mini PC for light workloads

The ZOTAC ZBOX-CI331NANO-U is a fanless barebone system built around an Intel Celeron N5100 quad-core processor running at 1.1 GHz up to 2.8 GHz. It targets users who need a completely silent 0.9L chassis for digital signage, home theatre or basic office tasks and are comfortable adding their own memory, storage and operating system.

Upgrade from older fanless or noisy small PCs

This unit replaces earlier passively cooled boxes that struggled with 4K 60 Hz output or offered only single Gigabit Ethernet. The jump is worth it when you need triple-display support via HDMI 2.0b, DisplayPort 1.2 and VGA, plus dual 1 Gbps LAN, WiFi 5 and Bluetooth 5.0 in a palm-sized enclosure that draws minimal power.

Simple SO-DIMM and SATA installation

Installing up to 16 GB of DDR4 2933/2666 memory in the two 260-pin slots and a single 2.5-inch SATA 6.0 Gb/s drive is straightforward, but the compact interior leaves little room for manoeuvre. The main issues are forgetting that no RAM or SSD ships with the barebone, and overlooking the need for low-profile modules to avoid pressure on the aluminium heatsink.

How it compares

Measured against everything we stock in Mini PC Barebone Systems, at today’s prices. Recalculated every night.

Price $221.99
Cheaper than about 89% of the 1,735 comparable items (median $564.99).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameZotac
Product lineZbox
Model nameZBOX-CI331NANO-U
Part numberZBOX-CI331NANO-U
Product colorBlack
Memory
RAM slots2 × 260Pin SO-DIMM
Supported memoryDDR4 2933/2666
Maximum supported memory16 GB
Storage
SATA ports1 x SATA 6.0Gb/s
Graphics
Built-in graphicsIntel UHD Graphics
Audio & video
Channel count8 Channel
Connectivity
Maximum network speedDual 1 Gbit/s
Wi-Fi standard802.11ac
Bluetooth supportYes
Ports & slots
Front USB ports2
Front audio jacks2 jacks
Memory card reader3 in 1
VGA ports1 x D-sub
HDMI ports1
DisplayPort connectors1 x DisplayPort
Rear USB ports3
Ethernet port2
Size & build
Product dimensions5.03 × 4.99 × 2.24
Shipping weight0.91 kg
Package size235 × 235 × 88 mm

Questions about this item

Does the 0.9 L chassis include a VESA bracket so I can mount it behind a monitor?

Yes, a VESA mount is included with the barebone for attaching it to the back of a display or on a wall.

Which screw do I remove to open the case for the two 260-pin SO-DIMM slots and the single SATA 6.0 Gb/s bay?

Unscrew the single captive thumb-screw on the bottom panel, lift the cover, then insert DDR4 2933/2666 modules and a 2.5-inch SATA drive.

If the thermal paste on the CPU heatsink dries out after a few years, can I replace it without special tools?

Remove the bottom cover, detach the aluminium heatsink held by four spring-loaded screws, clean the old paste, apply fresh compound, and reassemble.

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