Mini PCs have steadily grown in popularity, offering users a compact and efficient alternative to full-sized desktops. They fit easily into small spaces, consume less power, and deliver enough performance for everyday computing. For those who value both affordability and functionality, the Kamrui E3B presents itself as an appealing option.
Kamrui has built a reputation in this growing segment as a brand known for reliable, affordable mini PCs. Available on major platforms such as Amazon and AliExpress, Kamrui systems are designed for users who need a capable machine for office work, media playback, and day-to-day computing tasks. Unlike brands that emphasize premium builds and cutting-edge hardware, Kamrui’s approach centers on simplicity, value, and consistent performance.
The Kamrui E3B features a clean, all-black design that fits naturally into office or home setups. Despite its modest size, it comes equipped with capable hardware built around the AMD Ryzen 5 7430U processor and Radeon RX Vega 7 integrated graphics. The model tested includes 32 GB of DDR4 memory and a 512 GB M.2 SSD, which gives it the responsiveness needed for multitasking, productivity, and light gaming.
This mini PC also offers practical design touches such as VESA mount compatibility, allowing users to attach it to the back of a monitor for a clutter-free workspace. Its cooling system relies on a quiet top-mounted fan and side vents that keep temperatures under control during extended use. With multiple connectivity options and support for up to three monitors, it is well-suited for office productivity, media playback, and everyday tasks.
Grab the KAMRUI E3B Mini PC on Amazon for $287.99 using promo code A8PILEGC. Offer valid Nov 3–30, 2025.
In this hands-on review, we examine the Kamrui E3B’s real-world performance, thermal behavior, and usability. The goal is to see how well this compact system handles daily workloads and whether it delivers enough value to compete in the growing market of affordable mini PCs.
Specifications
| Specification | Details |
|---|---|
| Brand | KAMRUI |
| Series | E3B |
| Processor (CPU) | AMD Ryzen 5 7430U (up to 4.3 GHz) |
| Graphics (GPU) | AMD Radeon RX Vega 7 |
| Memory (RAM) | 32 GB DDR4 (3200Mhz) |
| Storage | 512 GB M.2 2280 SATA SSD |
| Operating System | Windows 11 Pro |
| 4K Support | 4K @ 60Hz |
| Wi-Fi | WiFi 6 (802.11 a/b/g/n/ac) |
| Bluetooth | Bluetooth 5.2 |
| Output Interface | 1× USB Type-C 3.2 Gen2, 2× USB Type-A 3.2 Gen2, 4× USB Type-A 3.2 Gen1, 1× HDMI, 1× DisplayPort 1.4, 1× RJ45, 1× MIC-IN, 1× DC Port, 1× AUDIO-OUT |
| Cooling | Built-in Fan |
| Item Weight | 580 Grams |
| Package Dimensions | 9.37 × 7.2 × 2.95 inches |
Unboxing
The KAMRUI E3B Mini PC arrives in a simple yet sturdy cardboard box with the words “Mini PC” printed boldly on top. On the back, a detailed product label lists specifications such as RAM, storage options, with the KAMRUI logo sealing the box for authenticity.
Inside, the package includes the KAMRUI E3B Mini PC, a power adapter, and a power cable for connectivity, an HDMI cable for display setup, a VESA mount that allows you to attach the device behind a monitor for a clean desktop setup, and a user manual to guide you through installation and initial setup.
Design
The KAMRUI E3B Mini PC features a compact grayish-black matte body with smooth, rounded corners, giving it a clean and simple appearance. Measuring 9.37 × 7.2 × 2.95 inches and weighing 580 grams, it’s easy to place on a crowded desk or hide under a shelf. The embossed KAMRUI logo sits on the top panel. Its design focuses on practicality and space-saving, making it suitable for both home and office use.
The KAMRUI E3B Mini PC includes a practical mix of ports for daily productivity and entertainment. On the front, it features two USB-A ports, a USB-C port with video output capability, a 3.5mm audio jack, and the power button for easy access. The rear panel adds DC-in, Gigabit Ethernet, HDMI 2.0, DisplayPort 1.4, and four USB-A 3.2 Gen 1 ports. This setup allows users to connect multiple monitors, external drives, and other accessories efficiently, making it a flexible option for work or home setups.
The sides of the E3B feature large perforations that serve as cooling vents, helping maintain stable performance by improving airflow across the chassis.
The bottom of the device keeps things simple, with additional ventilation holes and four rubber feet that prevent slipping while also hiding the screws securing the bottom panel. Removing these feet reveals the screws, allowing users to open the case for easy memory or storage upgrades. Smaller holes on the underside are designed for the VESA mount adapter, providing flexibility to attach the E3B behind a monitor or on a wall for a tidy and space-saving setup.
Hardware and Features
The KAMRUI E3B Mini PC is powered by the AMD Ryzen 5 7430U processor, a 6-core, 12-thread chip built to deliver efficient performance for office, educational, and home use. It is paired with AMD Radeon RX Vega 7 graphics, offering reliable visuals for everyday productivity, streaming, and light creative tasks. This combination provides a stable foundation for users who want consistent performance without taking up much desk space.
The review unit includes 32GB of dual-channel DDR4 memory configured through two 16GB modules, offering stable performance during multitasking and daily productivity tasks. Memory can be expanded up to 64GB, providing room for more intensive workloads such as video editing or virtual machines. For storage, the E3B comes with a 512GB 2280 M.2 SATA SSD that delivers reliable performance for office use, software installation, and general data handling. While the M.2 SATA interface is slower than NVMe drives, it remains efficient for typical workloads and ensures smooth operation for most users.
Storage expansion is one of this Mini PC’s key strengths. It comes with two M.2 2280 slots, enabling users to add up to 4TB of internal storage using two 2TB SSDs. This makes it suitable for users who handle large datasets, multimedia files, or software libraries.
In terms of connectivity, the KAMRUI E3B supports Wi-Fi 6 for stable wireless connections, Bluetooth 5.2 for easy pairing with accessories, and a single RJ45 10Gbps Ethernet port for wired networking. While some Mini PCs feature dual LAN ports, the single port here should be sufficient for most office and home environments. Display support is also generous, with the ability to connect up to three 4K monitors at 60Hz, making it ideal for multitasking or productivity setups.
Overall, the KAMRUI E3B offers a balanced mix of performance, expandability, and connectivity. Its hardware design focuses on practical business use, providing the right features for professionals who need a compact, efficient system with room to grow.
Startup and Initial Setup
Before getting into the operating system, the BIOS setup deserves attention. The Kamrui mini PC uses an AMI BIOS that offers a clean interface and a good range of configuration options, including TPM 2.0 and PXE boot support. During the first startup, Windows 11 Professional installs without issues, and users can choose between a Microsoft account or a local account. The installation image is clean, containing only Microsoft’s default tools without unnecessary preloaded software. Kamrui also mentions that the device is compatible with Linux, giving users flexibility for different setups.
The mini PC features a MediaTek Wi-Fi 6E MT7922 module, even though the official specifications only list Wi-Fi 6. This upgrade enables better network performance and higher data transfer speeds, with test results reaching up to 87 MB/s on a fiber connection. The tested model includes an AMD Ryzen 5 7430U processor paired with 32GB of DDR4 RAM, while another variant comes with 16GB. The six-core Zen 3+ processor delivers efficient performance suitable for work, multimedia, and general daily use.
Performance
The Kamrui E3B Mini PC provides a solid balance between power and efficiency, delivering reliable performance for office tasks, media playback, and general computing. With the AMD Ryzen 5 7430U processor and Radeon RX Vega 7 graphics, it maintains smooth operation across different workloads without noticeable slowdowns. CPU-Z confirms the hardware configuration, showing a capable and balanced compact system ready for reliable operation.
CPU Benchmark
Powered by a 6-core, 12-thread AMD Ryzen 5 7430U running up to 4.3 GHz, the Kamrui E3B handles multitasking and productivity applications effectively. In Cinebench R23, it achieved around 1397 points in single-core and 7562 points in multi-core, which places it among capable processors for compact systems. Everyday operations such as file management, document editing, and web browsing are performed consistently. Under heavy load, the cooling system kept temperatures in check, ensuring steady performance without thermal drops.
Memory Benchmark
The review unit includes 32 GB of dual-channel DDR4 memory running at 3200 MHz. In AIDA64 tests, it reached read speeds of around 40880 MB/s and write speeds close to 42256 MB/s, offering good responsiveness for multitasking. Switching between applications, managing multiple browser tabs, and running virtual meetings all remained fluid. The dual-channel setup plays a key role in keeping the system responsive and improving integrated graphics performance.
SSD Benchmark
The built-in 512GB 2280 M.2 SATA SSD delivers dependable storage performance for daily workloads. In CrystalDiskMark tests, the drive recorded read speeds near 574.77 MB/s and write speeds around 476.08 MB/s. System startup and application load times were fast, and transferring large files felt quick and seamless. For users who need more space, the additional M.2 slot allows easy expansion up to 4TB.
Gaming Performance
Although not designed as a gaming PC, the integrated Radeon RX Vega 7 GPU can handle casual and older games at 1080p. Titles such as Valorant, League of Legends, and CS: GO reached frame rates above 70 FPS on medium settings. Games like GTA V ran at around 45 FPS on medium settings, while more demanding titles required low settings for stable playability. The Vega 7 graphics unit also manages 4K video playback smoothly, making it suitable for streaming and entertainment use.
Thermal and Power Behavior
The cooling system in the Kamrui E3B operates quietly and efficiently. During standard workloads, CPU temperatures stayed between 55°C and 65°C, while heavy use brought them up to around 85°C. Fan noise remained minimal, and there were no signs of thermal throttling. Power consumption averaged 35–40 watts under load and dropped to below 10 watts when idle, highlighting its energy-efficient design.
In daily use, the Kamrui E3B performs reliably across productivity, web-based tasks, and multimedia applications. It boots quickly, runs multiple programs without delay, and stays cool under pressure. While not intended for high-end gaming or intensive creative work, it offers dependable performance for users who need a compact and efficient desktop replacement.
Conclusion
The KAMRUI E3B Mini PC is currently available at a limited-time promotional price on Amazon. Originally listed at $399.99, it’s now discounted to $319.99, and buyers can save an additional 10% by applying the promo code A8PILEGC at checkout. This brings the final price down to $287.99. The offer is valid from November 3, 2025, at 01:00 PST until November 30, 2025, at 23:59 PST. You can grab this deal directly from Amazon while the code lasts.
