Fanless Mini PC: Best Silent Picks (2026)

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A fanless mini PC is one of the few pieces of homelab hardware you can drop into a living room, a bedroom or a shared office and genuinely forget about — no fan whine at 2 a.m., no bearing to wear out, no airflow pulling dust through a heatsink. It is also the most misrepresented category in the mini-PC market. A large share of the machines sold as "silent," "near-silent" or "noise-free" still have a fan inside, and several product families that routinely surface in fanless shopping results do not qualify at all. If you are still narrowing down a platform, it is worth starting with the silicon itself — our N100 mini PC buying guide covers the processor class that underpins most of the picks below.

The genuinely passive options are concentrated in a handful of lineups rather than spread across the big consumer brands. MeLE's Quieter family and MINIX's 0dB range make up most of the desktop picks, ZOTAC's C-series carries the higher-performance end, ASUS's ExpertCenter PN42 is the commercial appliance, and the networking side is owned by GEEKOM's new iX12 and Protectli's Vault line. Measured wall-idle figures land in a narrow band around 6–7 W for the N100/N150 class, which is what makes these boxes interesting for always-on duty in the first place.

This guide is organised around the numbers that actually decide whether passive cooling works for your workload: wall-idle draw measured at the outlet rather than CPU TDP, sustained package power and chassis temperature rather than burst benchmarks, the exact Ethernet controller behind each port rather than the port count, and what each storage slot can actually accept. Every pick here has been checked for genuine passive cooling — no internal fan, no moving cooling component — and the chassis kits are separated from the ready-to-run systems so the two are never compared as if they were the same thing.

It is aimed at homelab builders running Plex or Jellyfin, Proxmox containers, Home Assistant, pfSense or OPNsense, and light file storage — readers who care about idle watts, NIC silicon and thermal headroom more than a three-second benchmark score.

Quick Picks

What Actually Makes a Fanless Mini PC Worth Buying

Passive cooling is a physical constraint, not a marketing badge, and it changes the buying criteria in ways a generic "silent PC" list tends to skip.

Genuine fanless means the complete system ships without an internal cooling fan or any other moving cooling component. A chassis kit that becomes fanless once you transfer a compatible board into it is a different product with a different risk profile. A quiet actively cooled mini PC that reviewers describe as inaudible at idle is not fanless at all — it simply has a fan that is not yet audible under light load.

Wall-idle power is the number that matters for 24/7 duty, and it is not CPU TDP. A continuous 5 W difference between two otherwise similar boxes works out to roughly 43.8 kWh over a year, which over several years can outweigh a modest purchase-price gap. Processor base power excludes the NIC PHYs, SSDs, memory, USB devices, Wi-Fi radios and PSU losses that make up the rest of the draw, so measured outlet figures are the only ones worth comparing. The practical pattern for the N100/N150 class is roughly 6–7 W at idle and 12–20 W sustained, with short peaks well above that.

Passive cooling does not mean zero throttling. Independent instrumented testing shows passive N100/N150 systems deliberately reducing sustained package power to stay inside their thermal envelope: a Quieter-class N100 dropped CPU clocks toward roughly 1.2 GHz under combined CPU/GPU stress at stock limits, and an ExpertCenter PN42-family system touched approximately 99 °C during its initial boost before settling near a 6 W long-term package target. Power limiting is the mechanism that makes silent cooling reliable, not a defect — the editorial question is whether the sustained performance still covers your workload.

NIC silicon matters more than port count. Intel I226-V 2.5GbE controllers have a stronger driver and firmware story for pfSense/OPNsense than Realtek consumer NICs, and a single-Ethernet mini PC is not a firewall recommendation just because a firewall image will boot on it. Routing on one port through VLAN trunks is a deliberate network design, not a beginner-friendly substitute for two physical interfaces.

Storage topology is where passive boxes differ most. An M.2 slot can be NVMe, SATA-only, or both — and the lane width matters. The GEEKOM iX12 and Protectli VP2420e both expose SATA-only M.2 slots, while the ZOTAC CI337 restricts its M.2 to PCIe 3.0 ×1 or SATA. The presence of a 2.5-inch bay is a genuine advantage for a light file server, but a single 2.5-inch bay does not make a machine a multi-bay NAS.

Intel Quick Sync is the quiet argument for Intel in a passive box. Plex hardware transcoding on an N100/N150/N300 runs on the media engine rather than the CPU cores, so light transcoding is realistic even on a passively cooled 4-core chip — provided the iGPU is correctly exposed to Plex through Docker, LXC or a VM. Workloads that fall back to software encoding (subtitle burn-in, unsupported conversions, some HDR tone-mapping paths) are exactly where a passive chassis gets slow, because that fallback lands on the CPU.

And, for completeness: passive cooling is not automatically the better design. A quiet actively cooled mini PC can sustain higher package power, cool NVMe and VRMs with airflow, cost less for the same CPU, and offer newer silicon. If the machine lives in a utility room or rack where noise is irrelevant, removing the fan buys you very little. For sustained compiling, software encoding, heavy local AI or multi-VM CPU work, paying a premium for passive cooling can produce a slower machine than an inexpensive active model.

#1 MeLE Quieter 4C N150 — The Smallest Silent Node

Specs

• CPU: Intel Processor N150, 4 cores / 4 threads, up to 3.6 GHz
• Graphics: Intel UHD Graphics with Intel media engine / Quick Sync
• Memory: soldered, configuration-dependent DDR4-3200, LPDDR4X-4266 or LPDDR5-4800; 8 GB / 16 GB / 32 GB configurations; no SO-DIMM slot
• Storage: one M.2 2280 slot supporting NVMe or SATA, specified up to 4 TB; microSD expansion up to 2 TB
• Networking: Realtek RTL8111H 1GbE
• Wireless: Wi-Fi 5, Bluetooth 5.1
• Display: two HDMI outputs plus DisplayPort 1.4 over USB-C, triple-display layouts, 4K output
• Power input: 12 V / 2 A on current 4C configurations
• Dimensions: approximately 131 × 81 × 18 mm; VESA-compatible

Measured behaviour

• Wall idle: approximately 7.3 W in Windows and 7.1 W in Ubuntu on the independently tested N100 unit; a separate N150 review reported roughly 6.1 W idle
• Load: about 12.5–12.8 W average under sustained stress, with 16.2–18.5 W short peaks; N150 full CPU load reported around 12.8 W
• Thermals: approximately 68 °C CPU under stock combined CPU/GPU stress, with the chassis top near 64.5 °C; CPU clocks settled toward roughly 1.2 GHz at stock power limits
• Limit experimentation: raising PL1/PL2 to 20 W / 25 W materially increased performance but pushed CPU temperature to roughly 98 °C and produced thermal throttling

At the stock power limits, the Quieter 4C is the lowest-power way into a genuinely silent x86 node, and its 18 mm chassis makes it the easiest of these picks to hide behind a display via VESA. The trade-off is soldered memory, so the capacity you buy is the capacity you keep, and a single Realtek 1GbE port that suits a services host but not a router.

Perfect for: Home Assistant and Docker appliances, lightweight Proxmox hosts, Plex/HTPC duty where Quick Sync carries the transcoding, kiosk and digital-signage nodes.

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#2 MINIX NEO Z150-0dB — The Best All-Round Fanless Server

Specs

• CPU: Intel Processor N150, 4 cores / 4 threads, up to 3.6 GHz
• Memory: one DDR4-3200 SO-DIMM; 16 GB installed on the recommended configuration, up to 32 GB
• Storage: one M.2 2280 PCIe 3.0 ×4 NVMe slot, up to 4 TB; microSD up to 2 TB
• Networking: one Realtek RTL8125 2.5GbE port
• Wireless: Intel AX201 Wi-Fi 6, Bluetooth 5.2
• Display: two HDMI 2.1 TMDS outputs supporting 4K60
• USB: one USB-C 3.2 Gen 2 data port, two USB-A 3.2 Gen 2, two USB 2.0; USB-C carries no video and no PD input
• Power: 12–19 V DC supported; supplied adapter 12 V / 3 A
• Dimensions: 123 × 120 × 46 mm; approximately 0.89 kg; VESA
• OS: Windows 11 Pro on the complete-system configuration

Measured behaviour

• Wall idle: approximately 7 W including attached USB peripherals, with the bare machine estimated around 5–6 W
• Load: approximately 20 W at the wall once Prime95 settles, after a roughly 26 W short-duration peak; 4K60 AV1 YouTube playback measured approximately 13–14 W
• Thermals: around 50 °C in normal office use with brief spikes toward 80 °C; a two-hour combined Prime95/FurMark run averaged roughly 60 °C without thermal throttling, with the exterior top near 53 °C
• Firmware: a roughly 6 W long-duration package limit restrains sustained CPU clocks — the heat is handled, the power ceiling is the constraint

This is the pick most readers should start with. The large finned aluminum enclosure gives the SoC far more thermal mass and surface area than a slim chassis can, which is why it holds roughly 60 °C through a two-hour combined stress run without ever throttling, and it does so with an upgradeable DDR4 SO-DIMM and a 2.5GbE port. The 46 mm body is not palm-sized, and the USB-C port is data-only, but as a 24/7 fanless server the balance of thermals, memory serviceability and networking is the strongest on this list. We covered the platform in more depth in the MINIX Z150-0dB review.

Perfect for: Silent Plex/HTPC duty, general-purpose always-on servers, office machines where user-serviceable RAM beats a smaller footprint.

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#3 MINIX NEO Z300-0dB — The Eight-Core Fanless Workhorse

Specs

• CPU: Intel Processor N300, 8 efficiency cores, up to 3.8 GHz
• Memory: one DDR4-3200 SO-DIMM; 16 GB installed, up to 32 GB
• Storage: 512 GB M.2 2280 PCIe 3.0 ×4 NVMe supplied; supports up to 4 TB; microSD expansion
• Networking: one 2.5GbE port
• Wireless: Wi-Fi 6, Bluetooth 5.2
• Display: two HDMI 2.0 ports, up to 4K60
• USB: USB-C data port, two higher-speed USB-A, two USB 2.0; USB-C has no video or PD
• Power: 12 V / 3 A adapter; approximately 12 W typical and 25 W maximum system specification
• Dimensions: 123 × 120 × 46 mm; approximately 0.89 kg; VESA
• OS: Windows 11 Pro

Measured behaviour

• Sustained clocks: owner testing under Ubuntu reported sustained CPU frequency falling to roughly 2 GHz or above under heavy stress — consistent with package-power limiting rather than thermal runaway
• Thermals: one Prime95 run recorded approximately 61–62 °C initially and 76–77 °C sustained, with 84–93 °C peaks depending on measurement point and method

Eight efficiency cores in the same 0dB chassis as the Z150 make this the pick when container density or compilation matters. It is not a substitute for a modern Ryzen mobile part — single-thread performance and long-duration package power remain modest — but for many concurrent CPU-light services it is a meaningful step up from the 4-core class. Spending the premium purely for "more Plex transcodes" is not good value, since all three N-series chips lean on the same Intel media block for efficient transcoding. Our MINIX Z300-0dB review digs into the platform-level trade-offs, and if you are planning a virtualisation host it pairs well with the guidance in our best mini PC for Proxmox roundup.

Perfect for: CPU-heavier Docker and Proxmox workloads, silent development boxes, multi-service home servers.

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#4 MeLE Quieter DL N150 — The Silent Dual-2.5GbE Router

Specs

• CPU: Intel Processor N150, 4 cores / 4 threads, up to 3.6 GHz
• Memory: LPDDR4X-4266 or DDR4-3200 depending on configuration; up to 32 GB sold; soldered, no SO-DIMM slot
• Storage: one M.2 2280 slot supporting NVMe and SATA SSD, plus microSD
• Networking: two Intel I226-V 2.5GbE ports
• Wireless: Wi-Fi 5, Bluetooth 5.1
• Video: HDMI + DisplayPort 1.4 + DisplayPort 1.4 over USB-C, triple displays
• Power: 12 V / 3 A
• Dimensions: approximately 6.61 × 3.74 × 0.84 inches; VESA supported

Measured behaviour

• Community testing reports approximately 8 W long-term and 25 W short power limits by default, with user experiments around a 10 W long-term limit landing in the 60–70 °C range — figures worth treating as anecdotal rather than lab-grade

The dual Intel I226-V controllers are the entire reason to pick this over a Quieter 4C: Intel 2.5GbE silicon has a stronger ecosystem fit for pfSense and OPNsense than Realtek consumer NICs, and two physical ports remove the need to route WAN and LAN over a single tagged interface. Storage and RAM upgrades add little to a router's usefulness next to getting the NIC topology right, but this is a compact passive chassis and it rewards open or vertical mounting when both PHYs and the CPU are busy continuously.

Perfect for: Very small silent pfSense/OPNsense routers, 2.5GbE edge appliances, Docker and Home Assistant hosts where two NICs matter more than CPU expansion.

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#5 GEEKOM iX12 — The Four-Port Fanless Firewall

Specs

• CPU: Intel Processor N95, 4 cores / 4 threads, up to 3.4 GHz, 15 W-class nominal
• Memory: one DDR5 SO-DIMM, up to 32 GB; 8 GB / 256 GB configuration available
• Storage: one M.2 2280 M-key SATA SSD slot (SATA, not NVMe); internal 2.5-inch SATA 6Gb/s support; optional onboard eMMC configurations
• Networking: four Intel I226-V 2.5GbE ports
• Wireless: Wi-Fi 6 via M.2 E-key 2230 module
• Cellular: M.2 3042/3052 B-key supporting USB-connected LTE/5G modules, plus SIM slot
• Video: HDMI 1.4 up to 4K60; DisplayPort 1.4 up to 8K60; USB-C 3.2 Gen 2 with DisplayPort output; no USB-C PD input
• Management: dedicated USB-C UART console at 115200 baud
• Power: threaded 12 V / 4 A, 48 W DC input
• Chassis: anodized aluminum; approximately 132.1 × 145 × 52.5 mm; approximately 0.95 kg; VESA
• Environment: −10 °C to 50 °C operating, 0–95 % non-condensing humidity, −30 °C to 70 °C storage
• Software support listed: XCP-ng 8.3 and Ubuntu 24.04.3 desktop/server alongside Windows 11 Pro
• Warranty: three years

The iX12 is unusual because it brings the topology previously found mostly on generic firewall boxes — four Intel 2.5GbE ports, console access, cellular expansion, an internal 2.5-inch SATA connection — under a recognised mini-PC brand with a three-year warranty. The anodised aluminum case is the heatsink, and the shipping unit is factory-passive; the board includes a CPU fan header, which does not mean the shipped system contains a fan. Because the product is new, there is not yet enough community history to draw conclusions about long-term VRM quality, SSD temperatures, BIOS quirks or DOA rates.

Perfect for: Four-port OPNsense/pfSense appliances, Proxmox edge hosts, industrial gateways, Home Assistant plus networking consolidation, light two-drive storage servers.

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#6 ZOTAC ZBOX CI337 nano — The Fanless Box With a 2.5-Inch Bay

Specs

• CPU: Intel Processor N100, 4 cores / 4 threads, up to 3.4 GHz, 6 W class
• Memory: one DDR5-4800 SO-DIMM, up to 16 GB
• Storage: one M.2 2242 slot supporting PCIe 3.0 ×1 or SATA, plus one internal 2.5-inch SATA 6Gb/s HDD/SSD bay
• Networking: two 1GbE Ethernet ports
• Wireless: Wi-Fi 6, Bluetooth 5.2
• Display: two HDMI 2.0, one DisplayPort 1.4, plus DisplayPort over USB-C; up to three displays
• USB: four USB 3.2-family ports including USB-C
• Power: 19 V, 40 W external adapter
• Dimensions: approximately 127.8 × 126.8 × 56.8 mm; VESA included/supported
• Sold as: barebone — RAM and storage purchased separately

Specs and behaviour

• Cooling: large internal aluminum heatsink integrated with ZOTAC's ventilated honeycomb chassis; ZOTAC specifies passive cooling and no moving cooling components
• Load: approximately 20 W total system power at full load according to ZOTAC's own system-level figure

This is more interesting as a tiny silent storage box than as a firewall. Two 1GbE ports are useful for segmentation but not for multi-gigabit routing, and the M.2 slot's PCIe 3.0 ×1 ceiling means high-end NVMe drives are wasted. What makes it stand out is the combination of true passive cooling and an internal 2.5-inch bay: the M.2 slot handles the boot/system disk while a SATA drive takes the bulk data, which is far more useful for a light file server than the single-M.2 layouts common on N100 machines. Note that fitting a mechanical 2.5-inch HDD keeps the computer fanless but forfeits zero moving parts — for genuinely silent storage, use a 2.5-inch SSD. The chassis is also well suited to compact builds of the kind we collected in our smallest mini PC picks.

Perfect for: Silent light-storage servers, low-power home servers, desktops and HTPCs where an internal 2.5-inch drive is a hard requirement.

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#7 ASUS ExpertCenter PN42 — The Commercial 24/7 Appliance

Specs

• CPU: Intel Processor N100 in the current US specification; verified N100 barebone code PN42-BBN100MV in official/regional material
• Memory: one DDR4-3200 SO-DIMM, up to 16 GB
• Storage: one M.2 2280 PCIe 3.0 ×4 NVMe slot; capacities up to 2 TB in current configurations
• Networking: 2.5GbE standard, with a configurable second 2.5GbE on relevant SKU/options
• Wireless: Wi-Fi 6E; current material lists Bluetooth 5.4
• I/O: front two USB 3.2 Gen 2 Type-A, microphone/audio, IR receiver on appropriate versions; rear two USB 3.2 Gen 1 Type-A, three USB 2.0, DisplayPort 1.4, HDMI 2.1; the configurable port may provide USB-C/DP, VGA, COM, DisplayPort, HDMI or a second Ethernet depending on SKU
• Power: 19 V / 3.42 A, 65 W adapter
• Dimensions: approximately 127.5 × 132 × 57.6 mm; approximately 0.84–1.04 kg depending on configuration; optional VESA
• Positioning: ASUS markets the PN42 for continuous 24/7 operation and commercial/embedded-style deployment

Measured behaviour

• Idle: an N200-class review measured roughly 4.4 W minimum, 6 W average and 9.7 W maximum at idle; independent testing also reported approximately 5–6 W at idle. The N100 should not be assigned the N200 figure as an exact measurement, but it establishes the very low idle range of the chassis family
• Load: about 14.6 W average under measured load with a 30.2 W brief maximum in the N200 test; roughly 22 W brief boost and about 12 W sustained in independent testing
• Thermals: approximately 43.7 °C upper surface and 47.2 °C lower surface at maximum chassis load
• Sustained behaviour: the design is intentionally power-limited — an N200 variant reached approximately 99 °C initially under stress before package power fell from around 14 W toward its 6 W long-term setting, settling near 71 °C

The configuration matrix is the main buyer trap here: some PN42s carry one 2.5GbE port, others can be ordered with a second 2.5GbE or a legacy COM/display option, so specs must be tied to the exact reseller SKU rather than to the family name. The one-DIMM, one-NVMe layout limits its appeal as a storage server, but the low measured idle figures and ASUS's explicit 24/7 commercial positioning make it a more dependable appliance than a generic consumer mini.

Perfect for: Office, kiosk and signage deployments, Home Assistant and small-business edge appliances, embedded applications that need COM or a second LAN.

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#8 Protectli Vault VP2420e — The Supported Quad-Port Vault

Specs

• CPU: Intel Celeron J6412, 4 cores, 2.0 GHz base / 2.6 GHz boost
• Virtualisation/security: Intel VT-x/VT-d and AES-NI
• Memory: one DDR4-3200 SO-DIMM, up to 32 GB
• Storage: M.2 SATA SSD, officially up to 2 TB (SATA, not NVMe), plus an internal 2.5-inch SATA 6Gb/s connection
• Networking: four Intel I226-V 2.5GbE ports
• Expansion: internal Wi-Fi and LTE/5G module support with antenna apertures and SIM functionality depending on module; Protectli notes its optional Wi-Fi module is not supported by BSD-based operating systems, which matters for pfSense/OPNsense
• Video: HDMI 1.4 + DisplayPort 1.4
• Console: Micro-USB console
• Firmware: AMI or coreboot options
• Power: 12 V; manufacturer lists a maximum of approximately 24 W
• Dimensions: approximately 146 × 127 × 50 mm; approximately 0.8 kg; VESA bracket, optional 1U rack mount
• Environment: −10 °C to 50 °C
• Warranty: two years
• Manufacturing: assembly in the US/Canada/Germany with NDAA-compliant supply positioning

The reason to pay more than for generic CWWK/Topton hardware is not raw performance: it is firmware availability, support, known Intel NICs, warranty, documentation and a stable SKU — characteristics that matter disproportionately for a device that may be the house's only internet gateway. The J6412 is considerably older and slower than an N150, so this is not the pick for a consolidated Plex + NAS + router host. Its strength is doing one infrastructure job predictably.

Perfect for: Mature four-port 2.5GbE pfSense/OPNsense appliances where support, firmware and warranty matter more than peak CPU performance.

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#9 Protectli Vault VP2440e — The 10GbE Fanless Firewall

Specs

• CPU: Intel Processor N150
• Memory: one DDR5-4800 SO-DIMM; Protectli-qualified configurations up to 64 GB
• Storage: one M.2 2280 NVMe PCIe 3.0 ×2 slot
• Networking: two Intel X710-BM2 10GbE SFP+ interfaces plus two Intel I226-V 2.5GbE RJ45 interfaces
• Expansion: M.2 E-key for Wi-Fi; M.2 B-key for cellular/LTE/5G
• Video/I/O: HDMI 2.1, USB-C display functionality, USB-C/USB-A data ports, serial/console connectivity according to configuration
• Firmware: AMI and coreboot support
• Power: 12 V / 5 A, 60 W supply; reference material places maximum consumption around the mid-40 W range depending on modules and load
• Dimensions: roughly 170 × 152 × 53 mm; VESA; optional rack accessories
• Environment: −10 °C to 50 °C
• Thermal construction: chassis cooling plus dedicated internal thermal pads and heatsinks for components and the NVMe drive

Measured behaviour

• Idle: an OPNsense user on the mechanically identical VP2440 reported approximately 12 W idle with a recent coreboot build and ASPM enabled — a useful proxy for the e-variant rather than an exact lab measurement of it
• Throughput: the same owner reported approximately 2 Gbps WireGuard performance with the Intel X710 interfaces described as stable

This is the strongest current shortlist choice when 10GbE is genuinely required. It is the same hardware as the VP2440 except that eMMC has been removed, and the internal heatsinking is engineered to pull heat off the highest-power components. Two cautions: SFP+ modules are a thermal consideration of their own — some 10GbE transceivers dissipate several watts each and run hot, so a passively cooled firewall that is comfortable with DACs can behave differently with power-hungry optical or RJ45 modules. For ordinary 1–2.5 Gbps home internet, the iX12 or VP2420e-class hardware is substantially simpler.

Perfect for: Serious fanless 10GbE router/firewall duty, VLAN gateways, small high-speed lab edge appliances.

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#10 ZOTAC ZBOX CI655 nano — The Silent Core Ultra Workstation

Specs

• CPU: Intel Core Ultra 5 225U, 12 cores / 14 threads
• Memory: two DDR5 SO-DIMMs, up to 64 GB, DDR5-5600/5200 depending on module
• Storage: two M.2 slots with PCIe 4.0 ×4 NVMe support; one slot also supports SATA-format storage depending on regional configuration
• Networking: 1GbE Ethernet
• Wireless: Wi-Fi 7, Bluetooth 5.4
• Display: DisplayPort 1.4 plus HDMI 2.0b, triple-display support through available display-capable interfaces
• USB: multiple USB 3.2 10 Gbps ports plus USB 2.0; USB-C available
• Power: 19 V / 65 W
• Dimensions: approximately 204 × 129 × 68 mm; roughly 1.79 L; approximately 1.06 kg; VESA
• Sold as: barebone

Measured behaviour

• Heat soak: extended testing showed performance declining from roughly 9,666 to 9,106 and then 8,754 as temperatures rose from the mid-70s into the 80s — a meaningful soak effect rather than catastrophic throttling
• Media playback: ZOTAC testing reports CPU package around 6.3 W and approximately 60–61 °C during a two-hour 1080p VLC test; package power is not wall power
• Sustained CPU package: approximately 14.9–15 W in longer heavy tests, with short peaks up to approximately 36 W
• Temperatures: roughly 60–84 °C through sustained tests, maximum approximately 91 °C, with only around 0.1 % of observed time above 90 °C

The CI655 demonstrates the fundamental premium-fanless trade-off: the chassis can dissipate a much more capable Core Ultra chip without a fan, but sustained benchmark scores decline as the aluminum mass saturates. The biggest homelab weakness is simply the 1GbE NIC — a machine in this performance class would be far more compelling for NAS or virtualisation with 2.5GbE or dual NICs. Treat it as a silent workstation first and a server second. It is a natural fit for a quiet desktop where local playback and CPU work dominate, of the sort covered in our best mini PC for HTPC roundup.

Perfect for: The fastest silent office/developer desktop on this list, code and build boxes, premium HTPCs.

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Passive Chassis Kits — When You Already Own the Board

These are not mini PCs. They are passive enclosures that become fanless systems only after you transfer a compatible motherboard into them and install the thermal assembly correctly. They are listed separately because the buyer profile and the failure modes are entirely different: cooling performance depends on the donor board, BIOS power limits, thermal-interface installation and ambient temperature.

Akasa Turing AC Pro (A-NUC95-M1B)

• Compatibility: ASUS/Intel NUC 13 Pro boards, with backward support for selected NUC 12 boards
• Processor envelope: supports compatible Core i3/i5/i7 boards up to approximately a 40 W-class passive heat-dissipation target
• Construction: solid aluminum external fins with an internal M.2 heatsink
• Storage: one 2.5-inch HDD/SSD up to 9.5 mm thick in addition to the motherboard's M.2 capability
• Dimensions: approximately 95 × 260 × 113.5 mm; two Wi-Fi antenna apertures; Kensington lock
• Power: optional 90 W/120 W 19 V supplies depending on processor configuration; PSU not included
• Optional VESA accessories

Turning an existing NUC 12/13 Pro board into a completely passive workstation or server while retaining an internal 2.5-inch drive is the point of this kit — and it can build a much faster passive computer than most factory N100 units. The requirement is that you must already own, or separately source, the correct NUC board, RAM, storage and power supply, then transfer the motherboard and install the thermal interfaces precisely.

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Akasa Turing Duo Pro (A-NUC99-M1B)

• Compatibility: ASUS ExpertCenter PN52/PN53 AMD platforms and ASUS PN64 Intel platform variants
• Passive cooling target: approximately a 40 W-class CPU envelope
• Thermal system: copper direct-contact CPU module plus two 6 mm copper heatpipes transferring heat into the solid aluminum chassis
• Storage: one 2.5-inch HDD/SSD up to approximately 13.1 mm in addition to motherboard storage
• Dimensions: approximately 120.5 × 101.5 × 274.1 mm; horizontal or vertical positioning; Wi-Fi antenna apertures; Kensington lock
• I/O openings follow the compatible ASUS board layout

This is the legitimate path to a higher-performance AMD passive mini PC. No mainstream current Beelink, MINISFORUM, GMKtec or ACEMAGIC Ryzen mini that appeared in this research pass qualified as a factory-fanless complete system, so the only route to a passively cooled Ryzen 6000/7000 H-series machine is to re-house a supported ASUS board. The downside is cost and complexity: donor board plus enclosure can exceed an actively cooled Ryzen mini, and incorrect thermal-pad or copper-module installation can erase much of the theoretical advantage.

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Frequently Asked Questions

Conclusion

The fanless mini PC market rewards careful shopping more than any other corner of the mini-PC space, because the gap between marketing and hardware is widest here. Half the machines that appear in a "silent mini PC" search still have a fan inside, and the brands most associated with compact computers currently have no qualifying complete passive system at all.

For most readers, the shortlist narrows to three machines. The MINIX NEO Z150-0dB is the default recommendation: upgradeable DDR4, 2.5GbE, roughly 60 °C through a two-hour combined CPU/GPU stress run and no thermal throttling, which is the most convincing evidence that its passive design is genuinely engineered rather than merely fan-free. The MeLE Quieter 4C N150 is the pick when footprint and idle draw dominate, accepting soldered memory and a single 1GbE port to get down to an 18 mm chassis running around 7 W at the wall. And the GEEKOM iX12 is the one to have if the job is networking: four Intel I226-V ports, a USB-C UART console, cellular expansion and a three-year warranty in a genuinely passive anodised aluminum case.

For everything else, match the machine to the workload rather than to the label. A silent router needs two physical Intel NICs before it needs CPU cores. A light file server needs a 2.5-inch bay more than it needs a faster chip. A workstation that must stay quiet should accept some heat-soak in exchange for Core Ultra compute and dual DDR5 SO-DIMMs. And if the box is going in a closet where nobody can hear it, buy the actively cooled machine, spend the difference on memory and storage, and keep the fan.

If you are still choosing the platform underneath the cooling design, our guides to the N100 mini PC class and to Proxmox hosts cover the silicon trade-offs in more detail, and the MINIX Z300-0dB review covers what eight efficiency cores actually deliver inside a passive chassis.

→ Check the current price of the MINIX NEO Z150-0dB on Amazon