KAMRUI Essenx E3
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The KAMRUI Essenx E3 is a compact mini PC that brings surprising versatility to the budget segment of the market. Powered by the AMD Ryzen 5 3500U processor, this small form factor computer offers quad-core processing power with eight threads, making it well-suited for everyday productivity tasks, web browsing, and media consumption. What sets the Essenx E3 apart from many competitors in its price range is the inclusion of dual Gigabit Ethernet ports, a feature typically reserved for higher-end or specialized networking devices. This makes it an attractive option for users who need network redundancy or want to set up a basic router or firewall configuration without spending on enterprise hardware.
The Essenx E3 shipped in two storage configurations over its life: an earlier 16GB/512GB SKU listed at $239, and a 16GB/1TB SKU listed around $369 and documented on the manufacturer’s product page. Both variants share the same chassis, processor, port layout, and dual Gigabit LAN; the only meaningful difference is the M.2 NVMe capacity that ships in the box.
Pros and Cons of the KAMRUI Essenx E3
| Pros | Cons |
|---|---|
| Dual Gigabit Ethernet ports for network flexibility | Older WiFi 5 and Bluetooth 4.2 wireless standards |
| Triple 4K display support via HDMI, DisplayPort, and USB-C | AMD Ryzen 5 3500U is a 2019-era processor |
| Compact 5-inch square footprint with VESA mount included | Only one RAM slot limits dual-channel memory |
| Upgradable RAM up to 32GB and storage up to 4TB | No 2.5-inch SATA bay for additional storage |
| Budget-friendly pricing across both 512GB and 1TB SKUs | Limited professional review coverage |
| USB 3.2 Gen 2 ports for fast peripheral connections | Single M.2 slot for storage expansion |
KAMRUI Essenx E3 Comparison Chart
 KAMRUI Essenx E3 | KAMRUI Essenx E3 | |
| Price | List Price: $239.00 Amazon Prices: | List Price: $369.00 Amazon Prices: |
| Version | 16GB/512GB/Ryzen 5 3500U | 16GB/1TB/Ryzen 5 3500U |
| Performance Rating | 5.3 | 5.3 |
| Operating System | Windows 11 Pro | Windows 11 Pro |
| Processor | Quad-core 2.10 Ghz (max 3.70 Ghz) AMD Ryzen 5 3500U | Quad-core 2.10 Ghz (max 3.70 Ghz) AMD Ryzen 5 3500U |
| GPU | Integrated Radeon RX Vega8 Graphics | Integrated Radeon RX Vega8 Graphics |
| RAM | 16 GB | 16 GB |
| Internal Storage | 512 GB | 1 TB |
| Dimensions width x length x thickness | 5.04 x 5.04 x 1.63 inches (128.02 x 128.02 x 41.4 mm) | 5.04 x 5.04 x 1.63 inches (128.02 x 128.02 x 41.4 mm) |
| Weight | unknown | unknown |
| WiFi | Wi-Fi 5 (802.11ac) | Wi-Fi 5 (802.11ac) |
| Bluetooth | Bluetooth 4.2 | Bluetooth 4.2 |
| Ethernet | 2 Ethernet ports at 1 Gbps | 2 Ethernet ports at 1 Gbps |
| HDMI | 1 HDMI Port | 1 HDMI Port |
| DisplayPort | 1 DisplayPort | 1 DisplayPort |
| VGA | No VGA Ports | No VGA Ports |
| USB Ports | 1 USB 2.0, 3 USB 3, 1 USB-C | 1 USB 2.0, 3 USB 3, 1 USB-C |
| Thunderbolt Ports | No | No |
| OCuLink | No | No |
| Internal SATA Ports | No SATA ports | No SATA ports |
| Card Reader | No Card Reader | No Card Reader |
| Headphone Jack | combo | combo |
| Fanless | No | No |
| VESA Mount | Yes | Yes |
| In the Box | Mini PC, power adapter, VESA mounting bracket, HDMI cable, instruction manual | Mini PC, power adapter, VESA mounting bracket, HDMI cable, instruction manual |
| Expandability | RAM upgradable to 32GB via 1x DDR4 SO-DIMM slot, storage expandable via M.2 2280 NVMe slot up to 4TB | RAM upgradable to 32GB via 1x DDR4 SO-DIMM slot, storage expandable via M.2 2280 NVMe slot up to 4TB |
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Detailed Insights into the KAMRUI Essenx E3
The KAMRUI Essenx E3 features a square design measuring 5.04 x 5.04 x 1.63 inches, making it compact enough to mount behind a monitor using the included VESA bracket or tuck away on a desk with minimal footprint. The all-black chassis maintains a professional appearance that blends seamlessly into home office or business environments. Build quality appears solid based on the metal and plastic construction typical of mini PCs in this category. Port accessibility is thoughtfully arranged with connections on both the front and rear panels, though specific layout details vary by production batch.
Performance expectations should be set appropriately for the AMD Ryzen 5 3500U, which was released in 2019 as a mobile processor for laptops. With a base clock of 2.1 GHz and boost up to 3.7 GHz, the quad-core, eight-thread chip handles office applications, video streaming, and light multitasking without issue. The integrated Radeon Vega 8 graphics can manage basic video editing and casual gaming at lower settings, though this is not a machine designed for demanding graphical workloads. The PassMark CPU benchmark score of approximately 6,831 places it in the basic tier of mini PC processors, suitable for everyday computing rather than intensive productivity work.
Connectivity options on the Essenx E3 are genuinely impressive for its price point. The dual Gigabit Ethernet ports stand out as a highlight, enabling uses as a network bridge, basic firewall, or simply providing redundant network connections for reliability. Triple 4K display output through HDMI 2.0, DisplayPort 1.4, and USB-C gives users flexibility in multi-monitor setups. The three USB 3.2 Gen 2 ports deliver fast data transfer speeds for external drives and peripherals, while the single USB 2.0 port handles legacy devices. WiFi 5 and Bluetooth 4.2 are functional but dated standards that may matter for users who prioritize wireless performance.
Conclusion
The KAMRUI Essenx E3 positions itself as a capable budget mini PC for users with specific needs that align with its strengths. The dual Gigabit Ethernet ports make it particularly attractive for home networking projects, small business deployments requiring network redundancy, or anyone looking to build an inexpensive firewall or router solution. The triple 4K display support adds versatility for multi-monitor productivity setups, while the compact dimensions and included VESA mount enable clean, space-efficient installations.
That said, prospective buyers should enter with clear expectations. The AMD Ryzen 5 3500U is a competent but aging processor that handles everyday tasks well but will struggle with demanding applications. The WiFi 5 and Bluetooth 4.2 wireless standards are functional but dated compared to current alternatives. Storage expansion is limited to the single M.2 slot without a 2.5-inch bay option. For users primarily focused on web browsing, document editing, video streaming, and basic productivity, the Essenx E3 delivers solid value at its price point. If you are still deciding whether a dedicated mini PC makes sense for your home office, the mini PC vs laptop comparison covers the real trade-offs on cost, multi-monitor productivity, and upgradeability.
For those looking to compare options, Starry Hope’s Mini PC Comparison Chart provides a valuable resource for evaluating the Essenx E3 against alternatives with different processors, connectivity options, and price points.
Frequently Asked Questions
Can the KAMRUI Essenx E3 be used as a home router or firewall?
Yes, the dual Gigabit Ethernet ports make the Essenx E3 well-suited for running firewall software like pfSense or OPNsense. The AMD Ryzen 5 3500U provides sufficient processing power for routing duties in most home and small office environments.
How many monitors can the KAMRUI Essenx E3 support simultaneously?
The Essenx E3 supports up to three displays simultaneously through its HDMI 2.0, DisplayPort 1.4, and USB-C with video output. All three connections support 4K resolution, making this mini PC suitable for multi-monitor productivity setups without requiring additional hardware.
Is the RAM upgradable in the KAMRUI Essenx E3?
Yes, the Essenx E3 has one DDR4 SO-DIMM slot that supports up to 32GB of RAM. Both the 512GB and 1TB SKUs ship with 16GB pre-installed. Note that having only one memory slot means you cannot enable dual-channel memory mode, which may slightly impact performance in memory-intensive applications.
What storage expansion options does the Essenx E3 offer?
The Essenx E3 includes one M.2 2280 NVMe PCIe 3.0 x4 slot that supports drives up to 4TB capacity. The pre-installed SSD (512GB on the original SKU, 1TB on the current Amazon listing) can be replaced or upgraded. Unlike some competitors, this model does not include a 2.5-inch SATA bay for additional internal storage, so expansion is limited to the single M.2 slot or external drives.
Is the KAMRUI Essenx E3 fanless or does it have active cooling?
The Essenx E3 uses active cooling with a built-in fan, tuned to run quietly during normal desktop use. The active cooling helps maintain stable temperatures during sustained workloads.
What operating system comes pre-installed on the KAMRUI Essenx E3?
KAMRUI’s product page advertises Windows 11 Pro pre-installed and activated, which on Pro builds includes features like BitLocker encryption and Remote Desktop that are not available in Windows 11 Home. If you specifically need Pro, it is worth confirming the edition on first boot and reaching out to the seller if the unit ships as Home.
Can the KAMRUI Essenx E3 be VESA mounted behind a monitor?
Yes, KAMRUI includes a VESA mounting bracket in the box. The compact 5-inch square dimensions make it easy to attach behind most monitors with VESA mount patterns, creating a clean all-in-one style setup while keeping desk space free for other uses.