Looking Beyond the ZOTAC ZBOX CI331 Nano Fanless Silent Mini PC? 6 Alternatives Worth a Look
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The ZOTAC ZBOX CI331 Nano fanless silent mini PC offers a quiet, compact platform for users who prioritize low noise and multiple display outputs. Its Intel N5100 processor and triple display support make it a solid choice for basic desktop tasks. However, some buyers may seek alternatives due to its older WiFi 5 standard, lack of included memory or storage, or larger physical footprint compared to newer models.
We selected 6 alternatives that share key specifications with the original, such as fanless cooling and barebone form factors. These options provide different networking capabilities, processor generations, or port densities. If you need faster Ethernet, a more modern CPU, or a smaller chassis, these alternatives may better fit your specific requirements. Each product listed here overlaps with the ZOTAC ZBOX CI331 Nano in core design philosophy, offering silent operation and compact sizes for various specialized uses.
Our top pick: Zotac ZBOX CI331 Nano N5100 Mini PC.
How each alternative compares
Glovary N150 6-Port Firewall Mini PC
The Glovary N150 swaps the ZOTAC’s general-purpose Intel N5100 for the newer Intel N100 processor. It replaces the triple display outputs with six LAN ports, including 2.5GbE connectivity. This shift makes it a specialized tool for network engineers rather than a desktop replacement. You lose video output options but gain high port density for OPNsense or pfSense builds. It is slightly larger and heavier than the ZOTAC. Choose this if you need a dedicated firewall router with modern networking speeds instead of a silent home desktop.
Glovary J4125 Fanless Firewall Mini PC
The Glovary J4125 uses an older Intel J4125 processor, which is less powerful than the ZOTAC’s N5100. It focuses on multiple Gigabit LAN ports for basic routing tasks. You give up the N5100’s higher performance and triple display capability. This model is smaller and lighter than the ZOTAC. It fits home labs well but lacks the speed for high-bandwidth networks. Pick this alternative if you need a silent, compact appliance for basic network routing and do not require modern processing power or multiple video outputs.
ZOTAC ZBOX CI337 Nano N100 Mini PC
The ZOTAC ZBOX CI337 Nano upgrades the processor to the Intel N100, offering better performance than the N5100. It keeps the fanless design and dual LAN ports. However, it reduces display outputs to two, losing the third port found on the CI331. It is significantly smaller and lighter than the original ZBOX. Choose this if you want a more efficient processor and a more compact footprint. It is ideal for users who prioritize silent operation and networking over triple-monitor support.
Glovary Barebone Fanless Firewall Mini PC
The Glovary F3 uses the older Intel J3710 processor, which is slower than the ZOTAC’s N5100. It includes 2.5G LAN ports for faster networking but lacks modern display outputs. You sacrifice processing speed and video versatility for specialized port density. This unit is slightly larger than the ZOTAC. It is designed for dedicated OPNsense routers. Select this alternative if you need 2.5GbE connectivity for a firewall setup and do not require a general-purpose desktop with multiple video outputs.
VNOPN J3710 Fanless Firewall Mini PC
The VNOPN J3710 features four 2.5GbE ports, offering faster networking than the ZOTAC’s dual Gigabit LAN. It uses the older J3710 processor, which is less powerful than the N5100. You lose the triple display support and modern wireless standards. This model is smaller and thinner than the ZOTAC. It is built for dedicated firewall and router setups. Choose this if you prioritize high-speed network ports and a compact form factor over general desktop performance and multiple monitor connections.
Montvfieto 8505 Fanless Mini PC
The Montvfieto 8505 offers a much more powerful Intel Core i5-1235U processor compared to the ZOTAC’s Celeron N5100. It includes 2.5G LAN ports for enhanced networking. You trade the ZOTAC’s triple display outputs for superior processing speed. This unit is slightly larger and heavier than the ZOTAC. It is designed for home lab firewall and soft router builds. Pick this alternative if you need high computational power and modern networking speeds for virtualization or intensive network tasks instead of basic desktop use.
Quick picks
Our 7 picks
Zotac ZBOX CI331 Nano N5100 Mini PC
Best for: silent multi-monitor desktop setups
- Processor
- Intel Celeron N5100
- Installed RAM
- Barebone
- Storage Capacity
- Barebone
- Graphics
- Intel UHD Graphics
- Ethernet Ports
- Dual Gigabit LAN
- Operating System
- No OS (Barebone)
View on Amazon: Zotac ZBOX CI331 Nano N5100 Mini PC Affiliate link
This fanless mini PC uses the Intel Celeron N5100 processor for silent operation. It supports triple displays via HDMI, DisplayPort, and VGA at 4K resolution. You get dual Gigabit Ethernet ports and Wi-Fi 5 connectivity. The unit is a barebone system, so you must add your own RAM and storage. It fits well in compact spaces thanks to its VESA mount compatibility.
Pros
- Intel Celeron N5100 quad-core processor
- Fanless silent cooling design
- Triple display output with 4K support
- Dual Gigabit LAN ports
- VESA mount compatible
Cons
- Sold as a barebone system without RAM or storage
- Only includes Wi-Fi 5, not Wi-Fi 6
- Ethernet ports are limited to Gigabit speeds
Good fit if
- You need a completely silent computer for office use
- You require multiple monitor outputs for a dashboard setup
- You want to install your own RAM and SSD
Skip if
- You need faster than Gigabit Ethernet speeds
- You want a system with pre-installed Windows
- You require Wi-Fi 6 or newer connectivity
Verdict: Zotac ZBOX CI331 Nano N5100 Mini PC is a solid choice for users who prioritize silent operation and multiple display outputs over raw processing power or modern wireless standards.
Glovary N150 6-Port Firewall Mini PC
Best for: multi-port 2.5GbE firewall and routing builds
- Processor
- Intel N150
- Installed RAM
- Barebone
- Storage Capacity
- Barebone
- Memory Type
- DDR5
- Graphics
- Intel UHD Graphics
- Ethernet Ports
- 6x 2.5GbE
View on Amazon: Glovary N150 6-Port Firewall Mini PC Affiliate link
This barebone unit features an Intel N150 quad-core processor inside a fanless aluminum chassis. It provides six Intel i226-V 2.5GbE Ethernet ports, a DDR5 memory slot, and dual M.2 NVMe slots. Triple display output runs across two HD ports and Type-C. It suits you if you need dense network routing, multi-interface firewall duty, and silent hardware operation.
Pros
- Six 2.5GbE Intel i226-V Ethernet ports
- Intel N150 processor with 6W TDP
- Dual M.2 NVMe slots plus 2.5-inch SATA support
- Silent fanless aluminum alloy chassis
Cons
- Ships barebone with no RAM, storage, or operating system included
- Four of the five USB-A ports run at USB 2.0 speeds
- Single DDR5 memory slot limits configuration to single-channel
Good fit if
- You need six dedicated 2.5GbE ports for advanced routing or firewall duties.
- You prefer configuring your own DDR5 RAM, NVMe storage, and operating system.
- You want silent operation using a fanless aluminum chassis.
Skip if
- You want a turnkey computer with pre-installed memory, storage, and an OS.
- You require multiple high-speed USB 3.0 or USB 3.2 peripheral connections.
Verdict: Glovary N150 Fanless 6-Port 2.5GbE Mini PC delivers high port density for homelab users and network administrators building a custom multi-segment firewall.
Glovary J4125 Fanless Firewall Mini PC
Best for: Home labs and basic network routing
- Processor
- Celeron J4125
- Installed RAM
- Barebone
- Storage Capacity
- Barebone
- Memory Type
- DDR4
- Graphics
- UHD Graphics 600
- Ethernet Ports
- 4 x 1000 Mbps
View on Amazon: Glovary J4125 Fanless Firewall Mini PC Affiliate link
This fanless mini PC uses the Intel Celeron J4125 processor for stable, low-power operation. It features four Intel i211 Gigabit Ethernet ports, making it suitable for multi-LAN routing and virtualization tasks. The barebone chassis includes one DDR4 SO-DIMM slot and storage options via mSATA or SATA. You get a quiet, compact aluminum unit with 4K display support. It is designed for home labs and network security appliances.
Pros
- Four Intel i211 Gigabit LAN ports
- Fanless aluminum alloy chassis
- Intel Celeron J4125 processor
- Supports up to 32GB DDR4 RAM
- Includes RS232 COM port
Cons
- Only Gigabit Ethernet speeds
- No RAM or SSD included
- Older Celeron J4125 processor
Good fit if
- You need four Gigabit LAN ports
- You are building a home firewall
- You require a fanless, quiet device
Skip if
- You need 2.5GbE network ports
- You want a pre-built system
- You need high-performance gaming
Verdict: Glovary J4125 Fanless Firewall Mini PC is a dedicated appliance for users who need multiple Gigabit LAN ports in a silent, compact form factor. It fits home labs and basic routing tasks well, but lacks the speed for modern high-bandwidth networks.
ZOTAC ZBOX CI337 Nano N100 Mini PC
Best for: silent home labs and dual LAN setups
- Processor
- Intel Processor N100
- Installed RAM
- Barebone
- Storage Capacity
- Barebone
- Graphics
- Intel UHD Graphics
- Ethernet Ports
- Dual Gigabit LAN
- Operating System
- No OS (Barebone)
View on Amazon: ZOTAC ZBOX CI337 Nano N100 Mini PC Affiliate link
The ZOTAC ZBOX CI337 Nano is a fanless mini PC powered by the Intel N100 processor. It features dual Gigabit LAN ports, WiFi 6, and triple display support via HDMI and DisplayPort. This barebone system allows you to install your own RAM and storage. It suits users who need silent operation and multiple network connections for home labs or office tasks.
Pros
- Intel N100 quad-core processor
- Fanless passive cooling design
- Dual Gigabit LAN ports
- Triple display output support
Cons
- Sold as a barebone system without RAM or storage
- Only includes PCIe 3.0 NVMe slot
- Limited to dual Gigabit Ethernet instead of 2.5GbE
Good fit if
- You need silent operation for a quiet workspace
- You require multiple network interfaces for networking projects
- You want to customize your own RAM and storage
Skip if
- You need pre-installed Windows and RAM
- You require 2.5GbE network ports
- You need high-end discrete graphics performance
Verdict: ZOTAC ZBOX CI337 Nano N100 Mini PC offers a compact, silent platform with dual LAN ports for networking enthusiasts who prefer to build their own system.
Glovary Barebone Fanless Firewall Mini PC
Best for: Dedicated OPNsense firewall routers
- Processor
- Pentium J3710
- Installed RAM
- Barebone
- Storage Capacity
- Barebone
- Memory Type
- DDR3L
- Graphics
- HD Graphics
- Ethernet Ports
- 4 x 2.5GbE
View on Amazon: Glovary Barebone Fanless Firewall Mini PC Affiliate link
This fanless mini PC uses a quad-core Pentium J3710 processor to handle network tasks quietly. It features four Intel i225V 2.5GbE LAN ports for robust connectivity. The barebone chassis supports DDR3L RAM and includes slots for mSATA and SATA storage. Its compact aluminum body measures 11 by 10 by 3.5 cm. This unit suits users building dedicated OPNsense or Linux firewall appliances who need silent operation.
Pros
- Four Intel i225V 2.5GbE LAN ports
- Fanless aluminum alloy chassis for silent running
- Quad-core Pentium J3710 processor up to 2.64 GHz
- Supports OPNsense, Linux, ESXi, and Proxmox
Cons
- Uses older DDR3L memory instead of modern DDR4 or DDR5
- Pentium J3710 processor is significantly less powerful than the N100 or N5100 found in other options
- Barebone system requires you to purchase RAM and SSDs separately
Good fit if
- You need four 2.5GbE ports for a home lab or firewall
- You want a completely silent fanless device for OPNsense
- You are building a low-power network appliance on a budget
Skip if
- You require modern DDR4 or DDR5 memory support
- You need high-performance computing for general desktop tasks
- You want a complete system with RAM and SSD included
Verdict: Glovary F3 J3710 Fanless Firewall PC is a specialized tool for network engineers who prioritize port density and silence over raw processing speed. It fits users building dedicated OPNsense routers who do not need modern memory standards.
VNOPN J3710 Fanless Firewall Mini PC
Best for: dedicated firewall and router setups
- Processor
- Intel J3710
- Installed RAM
- Barebone
- Storage Capacity
- Barebone
- Memory Type
- DDR3
- Ethernet Ports
- 4x 2.5GbE
- Use
- Firewall
View on Amazon: VNOPN J3710 Fanless Firewall Mini PC Affiliate link
The VNOPN J3710 is a barebone firewall mini PC built for network security tasks. It features an Intel J3710 quad-core processor and four Intel 2.5GbE LAN ports. The fanless aluminum design ensures silent operation with low power consumption. You need to add your own DDR3 RAM and mSATA storage. This unit is ideal for users who want a compact, dedicated device for routing or firewall duties.
Pros
- Four Intel 2.5GbE LAN ports for high-speed networking
- Fanless aluminum design for silent, heat-dissipating operation
- Supports AES-NI encryption for secure data processing
- Compact size allows for VESA monitor mounting
Cons
- Sold as a barebone system with no RAM or storage installed
- Intel J3710 processor is older and less powerful than modern alternatives
- Limited to DDR3 memory and mSATA SSDs only
Good fit if
- You need a dedicated, silent device for pfSense or OPNsense
- You want four 2.5GbE ports in a small form factor
- You prefer mounting the PC behind a monitor via VESA
Skip if
- You need a ready-to-use system with pre-installed RAM and storage
- You require high-performance computing for video editing or gaming
- You want the latest generation processor for maximum speed
Verdict: The VNOPN J3710 Fanless Firewall Mini PC fits users who need a compact, silent router with four 2.5GbE ports. It is a solid choice for network enthusiasts willing to install their own memory and storage.
Montvfieto 8505 Fanless Mini PC
Best for: home lab firewall and soft router builds
- Processor
- Pentium Gold 8505 or Core i5-1235U
- Installed RAM
- Barebone
- Storage Capacity
- Barebone
- Memory Type
- DDR5
- Ethernet Ports
- 4 Port 2.5GbE LAN
- Use
- Industrial
View on Amazon: Montvfieto 8505 Fanless Mini PC Affiliate link
This fanless Mini PC supports Intel Pentium Gold 8505 or Core i5-1235U processors. It features four 2.5GbE LAN ports for robust networking. DDR5 memory and PCIe 4.0 NVMe storage ensure fast performance. The silent design suits home labs and firewall tasks. You get triple display support via HDMI, DisplayPort, and Type-C. It is a barebone system ready for your components.
Pros
- Four Intel I226 2.5G LAN ports
- Supports DDR5 dual-channel RAM
- PCIe 4.0 NVMe M.2 SSD support
- Triple display output capability
Cons
- Sold as a barebone system without RAM or storage
- Requires separate CPU and memory installation
- No pre-installed operating system included
Good fit if
- You need multiple 2.5GbE ports for a firewall
- You want silent operation for a home lab
- You prefer DDR5 memory and fast storage
Skip if
- You need a ready-to-use system with pre-installed parts
- You require more than four network ports
- You need built-in Wi-Fi or Bluetooth
Verdict: Montvfieto 8505 Fanless Mini PC is a solid choice for users building a dedicated firewall or soft router. It fits those who value silent performance and high-speed networking over plug-and-play convenience.
Specifications side by side
| Spec | Zotac ZBOX CI331 Nano N5100 Mini PC | Glovary N150 6-Port Firewall Mini PC | Glovary J4125 Fanless Firewall Mini PC | ZOTAC ZBOX CI337 Nano N100 Mini PC | Glovary Barebone Fanless Firewall Mini PC | VNOPN J3710 Fanless Firewall Mini PC | Montvfieto 8505 Fanless Mini PC |
|---|---|---|---|---|---|---|---|
| Processor | Intel Celeron N5100 | Intel N150 | Celeron J4125 | Intel Processor N100 | Pentium J3710 | Intel J3710 | Pentium Gold 8505 or Core i5-1235U |
| Installed RAM | Barebone | Barebone | Barebone | Barebone | Barebone | Barebone | Barebone |
| Storage Capacity | Barebone | Barebone | Barebone | Barebone | Barebone | Barebone | Barebone |
| Memory Type | not stated | DDR5 | DDR4 | not stated | DDR3L | DDR3 | DDR5 |
| Graphics | Intel UHD Graphics | Intel UHD Graphics | UHD Graphics 600 | Intel UHD Graphics | HD Graphics | not stated | not stated |
| Ethernet Ports | Dual Gigabit LAN | 6x 2.5GbE | 4 x 1000 Mbps | Dual Gigabit LAN | 4 x 2.5GbE | 4x 2.5GbE | 4 Port 2.5GbE LAN |
| Operating System | No OS (Barebone) | No OS (Barebone) | not stated | No OS (Barebone) | not stated | not stated | not stated |
| Use | not stated | Firewall | Industrial, Firewall | not stated | not stated | Firewall | Industrial |
| Cooling | Fanless | Fanless | Fanless | Fanless | Fanless | Fanless | Fanless |
| Networking | not stated | 2.5G LAN | not stated | not stated | 2.5G LAN | 2.5G LAN | 2.5G LAN |
| Form Factor | Barebone | Barebone | Barebone | Barebone | Barebone | Barebone | Barebone |
| Dimensions | 9.25 × 9.25 × 3.46 inches | 7.09 × 4.92 × 2.17 inches | 6.97 × 4.92 × 2.17 inches | 5.03 × 4.99 × 2.24 inches | 6.3 × 5.91 × 5.51 inches | 5.28 × 5 × 1.46 inches | 6.3 × 7.5 × 1.97 inches |
| Weight | not stated | 2.65 pounds | not stated | 1.94 pounds | not stated | not stated | 2.2 pounds |
| Size | NO SSD, NO RAM, NO MEMORY | No RAM No SSD | Barebone | Ultra Small Form Factor | Barebone No RAM No SSD | mini | not stated |
| Color | Black | N100 6 LAN Firewall | not stated | Black | not stated | Black | Black |
| Model | ZBOX-CI331NANO-U | N100-6L-BA | J4125-4L-I211-0-0 | ZBOX-CI337NANO-U | F3 | F12 | Elite Edition 8505/U300e/I5-1235u |
If you need higher processing power than fanless models deliver, you can compare geekom it13 mini PC alternatives.
Frequently asked questions
Does the Zotac ZBOX CI331 Nano come with RAM and storage installed?
No, this unit is sold as a barebone system. The specifications explicitly state it includes no SSD, no RAM, and no memory. You must purchase and install these components separately before the device can boot or operate.
What is the physical size of the Zotac ZBOX CI331 Nano?
The chassis measures 9.25 inches in width, 9.25 inches in length, and 3.46 inches in height. This compact footprint allows it to fit easily into tight spaces or mount behind a monitor, maintaining a low profile for desk setups.
Is the Zotac ZBOX CI331 Nano truly fanless?
Yes, the device features a fanless cooling design. This passive cooling method eliminates moving parts, resulting in silent operation. It relies on heat dissipation through the chassis to manage the Intel N5100 processor during typical desktop workloads.
What processor does the Zotac ZBOX CI331 Nano use?
It is powered by an Intel N5100 processor. This chip provides adequate performance for basic desktop tasks, media playback, and office applications. It balances energy efficiency with sufficient computing power for general home or office use.
Can I use the Zotac ZBOX CI331 Nano for a home firewall?
While possible, it is not optimized for this role. The unit lacks multiple dedicated network ports. Alternatives like the Glovary N150 or VNOPN J3710 offer four to six LAN ports, making them far more suitable for routing and firewall tasks.
Does the Zotac ZBOX CI331 Nano support multiple monitors?
Yes, it supports triple display outputs. This feature allows you to connect three screens simultaneously, making it ideal for productivity setups. The Intel N5100 processor handles multi-monitor tasks efficiently without requiring additional graphics hardware.
Is the Zotac ZBOX CI331 Nano suitable for gaming?
No, it is not designed for gaming. The integrated graphics in the Intel N5100 lack the power for modern titles. It is best suited for light office work, web browsing, and media consumption rather than demanding graphical applications or games.
What is the color of the Zotac ZBOX CI331 Nano?
The device comes in a black finish. This neutral color helps it blend into most home or office environments. The sleek design complements modern desk setups while maintaining a professional appearance for business or personal use.