KAMRUI Essenx E3

Updated on June 2, 2026

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 the current 16GB/1TB SKU available on Amazon for around $369 and confirmed by 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

KAMRUI Essenx E3 Comparison Chart

	KAMRUI Essenx E3	KAMRUI Essenx E3
Price	List Price: $239.00 Amazon Prices: Check Price on Amazon	List Price: $369.00 Amazon Prices: Loading 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

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.

Customer Reviews of the KAMRUI Essenx E3

Amazon customers have responded positively to the KAMRUI Essenx E3, with the current 16GB/1TB listing carrying a 4.7-star rating across 77 reviews as of this update. Aggregate buyer feedback consistently highlights the compact size and quiet operation, with the built-in fan keeping the system cool without generating distracting noise during normal use. The dual LAN ports get particular attention from networking buyers who appreciate having this feature at a budget price point, with several writeups noting use as a pfSense or OPNsense firewall appliance. This makes it a reasonable platform for Linux on Mini PCs projects, particularly small home-lab and routing roles where the dual-NIC layout matters more than raw CPU speed.

Common praise also centers on the straightforward setup process and the bundled Windows 11 install, which allows buyers to be productive immediately without dealing with activation hassles. The listing and the manufacturer page both advertise Windows 11 Pro, though a handful of recent Amazon reviewers report receiving a Windows 11 Home image instead; if Pro is a hard requirement for your use case, plan to verify the edition on first boot and contact the seller if it ships as Home. The VESA mount is frequently mentioned as a thoughtful inclusion that helps create a clean desk setup. Buyers also point to the value proposition as strong compared to building a comparable system from scratch or purchasing higher-priced alternatives with similar specifications.

On the critical side, some buyers point out that the Ryzen 5 3500U processor shows its age compared to newer AMD and Intel chips. A few buyers mention the single RAM slot as a limitation for those who want to maximize memory bandwidth through dual-channel configuration. The older WiFi 5 standard occasionally draws criticism from users with WiFi 6 routers who cannot take full advantage of their network speeds. Overall, the buyer consensus suggests the Essenx E3 delivers appropriate performance for its price category while acknowledging it is not suitable for demanding workloads.

A note on independent reviews

Independent professional review coverage of the Essenx E3 itself is limited. Most third-party KAMRUI coverage on YouTube centers on the newer E3B (which despite the similar name uses a different Ryzen 7 7730U or Ryzen 5 7430U platform) or the related E2 and Pinova product lines, not the original Ryzen 5 3500U Essenx E3. Buyers researching this specific model will find more depth from the Amazon question-and-answer threads and the official KAMRUI product page than from the standard tech-review channels. The reading above is grounded in the manufacturer’s specifications and the aggregate of Amazon buyer feedback, not in any single named reviewer’s hands-on testing.

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.

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