KAMRUI E3B

Updated on June 20, 2026

The KAMRUI E3B Mini PC is a compact computing solution designed for users seeking versatility and performance in a small form factor. Powered by the AMD Ryzen 7 PRO 5850U processor with eight cores and 16 threads, it offers a balance of efficiency and speed, making it suitable for multitasking, office work, and light gaming. The device comes pre-installed with Windows 11 Pro, offering modern features and security enhancements. With 16GB of DDR4 RAM, expandable up to 64GB, and a 512GB NVMe SSD, the E3B provides a solid foundation for general computing tasks. However, its internal storage speed may present limitations for more demanding workflows.

The Mini PC supports triple 4K displays via HDMI, DisplayPort, and USB-C, making it ideal for multi-monitor setups. Connectivity options include Wi-Fi 6, Bluetooth 5.2, and a 1Gbps Ethernet port, ensuring fast and reliable networking. Its compact design, VESA mount compatibility, and quiet cooling system make it a convenient choice for home and office environments.

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KAMRUI E3B Comparison Chart

	KAMRUI E3B	KAMRUI E3B	KAMRUI E3B	KAMRUI E3B	KAMRUI E3B
Price	List Price: $399.95 Amazon Prices: Check Price on Amazon	List Price: $369.99 Amazon Prices: Check Price on Amazon	List Price: $379.93 Amazon Prices: Check Price on Amazon	List Price: $339.99 Amazon Prices: Loading prices...	List Price: $349.00 Amazon Prices: Loading prices...
Version	16GB/512GB/Ryzen 7 PRO 5875U	16GB/512GB/Ryzen 7 PRO 5875U	32GB/512GB/Ryzen 7 5825U	32GB/512GB/Ryzen 5 7430U	16GB/512GB/Ryzen 5 7430U
Performance Rating	6.9	6.9	7.7	7.4	6.7
Operating System	Windows 11 Pro	Windows 11 Pro	Windows 11 Pro	Windows 11 Pro	Windows 11 Pro
Processor	Octa-core 1.90 Ghz (max 4.40 Ghz) AMD Ryzen 7 PRO 5850U	Octa-core 1.90 Ghz (max 4.40 Ghz) AMD Ryzen 7 PRO 5850U	Octa-core 2.00 Ghz (max 4.50 Ghz) AMD Ryzen 7 5825U	Hexa-core 2.30 Ghz (max 4.30 Ghz) AMD Ryzen 5 7430U	Hexa-core 2.30 Ghz (max 4.30 Ghz) AMD Ryzen 5 7430U
GPU	Integrated Radeon RX Vega8 Graphics	Integrated Radeon RX Vega8 Graphics	Integrated Radeon RX Vega8 Graphics	Integrated Radeon RX Vega8 Graphics	Integrated Radeon RX Vega8 Graphics
RAM	16 GB	16 GB	32 GB	32 GB	16 GB
Internal Storage	512 GB	512 GB	512 GB	512 GB	512 GB
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)	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)	5.04 x 5.04 x 1.63 inches (128.02 x 128.02 x 41.4 mm)
Weight	unknown	unknown	unknown	unknown	unknown
WiFi	Wi-Fi 6 (802.11ax)	Wi-Fi 6 (802.11ax)	Wi-Fi 6 (802.11ax)	Wi-Fi 6 (802.11ax)	Wi-Fi 6 (802.11ax)
Bluetooth	Bluetooth 5.2	Bluetooth 5.2	Bluetooth 5.2	Bluetooth 5.2	Bluetooth 5.2
Ethernet	1 Ethernet port at 1 Gbps	1 Ethernet port at 1 Gbps	1 Ethernet port at 1 Gbps	1 Ethernet port at 1 Gbps	1 Ethernet port at 1 Gbps
HDMI	1 Full-Size HDMI Port	1 Full-Size HDMI Port	1 Full-Size HDMI Port	1 Full-Size HDMI Port	1 Full-Size HDMI Port
DisplayPort	1 DisplayPort (Supports 4K@60Hz)	1 DisplayPort (Supports 4K@60Hz)	1 DisplayPort (Supports 4K@60Hz)	1 DisplayPort (Supports 4K@60Hz)	1 DisplayPort (Supports 4K@60Hz)
VGA	No VGA Ports	No VGA Ports	No VGA Ports	No VGA Ports	No VGA Ports
USB Ports	6 USB 3, 1 USB-C (USB-C supports DisplayPort)	6 USB 3, 1 USB-C (USB-C supports DisplayPort)	6 USB 3, 1 USB-C (USB-C supports DisplayPort)	6 USB 3, 1 USB-C (USB-C supports DisplayPort)	6 USB 3, 1 USB-C (USB-C supports DisplayPort)
Thunderbolt Ports	No	No	No	No	No
OCuLink	No	No	No	No	No
Internal SATA Ports	No SATA ports	No SATA ports	No SATA ports	No SATA ports	No SATA ports
Card Reader	No Card Reader	No Card Reader	No Card Reader	No Card Reader	No Card Reader
Headphone Jack	combo	combo	combo	combo	combo
Fanless	No	No	No	No	No
VESA Mount	Yes	Yes	Yes	Yes	Yes
In the Box	E3B Mini PC, Power Adapter & Cable, User Manual, VESA Mount with Screws, HDMI Cable	E3B Mini PC, Power Adapter & Cable, User Manual, VESA Mount with Screws, HDMI Cable	E3B Mini PC, Power Adapter & Cable, User Manual, VESA Mount with Screws, HDMI Cable	E3B Mini PC, Power Adapter & Cable, User Manual, VESA Mount with Screws, HDMI Cable	E3B Mini PC, Power Adapter & Cable, User Manual, VESA Mount with Screws, HDMI Cable
Expandability	Expandable RAM up to 64GB	Expandable RAM up to 64GB	Expandable RAM up to 64GB	Expandable RAM up to 64GB	Expandable RAM up to 64GB

Detailed Features of the KAMRUI E3B Mini PC

The KAMRUI E3B Mini PC is built around the AMD Ryzen 7 PRO 5850U processor, a high-performance chip with eight cores and 16 threads, capable of easily handling multitasking and demanding applications. The processor operates at a base clock speed of 1.9 GHz and can boost up to 4.4 GHz, making it suitable for tasks ranging from web browsing and office productivity to light gaming and media consumption. Paired with Radeon RX Vega8 Graphics, the E3B delivers smooth visuals for 4K video playback and casual gaming, though it may not be ideal for intensive 3D rendering or AAA gaming titles.

One of the standout features of the E3B is its expandability. The device comes with 16GB of DDR4 RAM, which can be expanded to 64GB across two channels, allowing users to future-proof their setup. Storage is handled by a 512GB NVMe SSD, ensuring fast boot times and quick access to files, though the internal SSD’s slower read/write speeds may impact performance in data-heavy tasks like video editing. For additional storage, the Mini PC includes two M.2 slots support NVMe and SATA drives, and the other is limited to SATA.

Connectivity is another strong point of the KAMRUI E3B. It supports triple 4K displays via HDMI, DisplayPort, and USB-C, making it an excellent choice for multitasking or professional workflows requiring multiple screens. With Wi-Fi 6, Bluetooth 5.2, and a 1Gbps Ethernet port, the Mini PC ensures fast and reliable networking. The compact design, measuring just 5.04 x 5.04 x 1.63 inches, includes a VESA mount, allowing users to attach it to the back of a monitor or a wall for a clutter-free workspace.

Reviewer Insights on the KAMRUI E3B

The KAMRUI E3B is sold across three AMD APU tiers, which is why independent reviewers ran different chips. The base configuration uses the Ryzen 7 PRO 5850U (Zen 3, eight cores and 16 threads, PassMark multi-thread around 16,967 in our reference data); other listings ship the closely related Ryzen 7 5825U (Zen 3, eight cores, PassMark around 18,350) or the Ryzen 5 7430U (a Zen 2 refresh, six cores and 12 threads, PassMark around 15,985). All three are low-power U-series mobile parts from the 2021 to 2023 era paired with integrated Radeon Vega graphics. By 2026 that puts the E3B in mid-tier territory: fine for office work, browsing, and media, but visibly behind newer 7000 and 8000-series APUs that pair RDNA-based Radeon 780M graphics with dual-channel DDR5. Across five reviewers covering the 5825U, PRO 5875U, and 7430U units, the verdict converges on the same two limiters: a slow SATA-class SSD and, on the 16GB units, single-channel RAM that holds back the integrated GPU.

Tech Brothers on the Ryzen 7 5825U E3B

Tech Brothers tested the 16GB/512GB E3B with the Ryzen 7 5825U, which he describes as having “a pretty low typical TDP of 15 W” with “a clock speed of 2 GHz and a turbo frequency of 4.5 GHz.” On the bench he logged real power draw: the machine “used up to 10 W in standby mode,” and under a stress test the package power “rose to 35 W and then dropped to 28 W.” Noise stayed low, with the fan “almost silent in standby mode about 39 dB” and rising “to only 40 dB at the maximum processor load.” He measured the bundled SSD at roughly 518 read and 465 write (megabytes per second), flatly calling it “really slow” and advising a swap.

His CPU numbers back the 5825U up: a Geekbench 6 run returned “1922 points in single core test and 6253 points in multi-core test,” and the unit booted Windows 11 Pro in 19 seconds (against 29 seconds for an AceMagic K1 on the older Ryzen 7 5700U). The 16GB of RAM was the recurring catch. Exporting one minute of a 4K Premiere Pro project took “1 minute and 22 seconds,” slower than a 32GB machine he had tested, leading him to recommend adding a second RAM stick. His bottom line: “for its price under $300, the Cam[rui] E3B is a decent mini computer for home and office,” provided you upgrade the RAM and the SSD.

Michael’s Stinkerings’ Benchmark Deep Dive

The independent review at Michael’s Stinkerings ran the most complete benchmark suite on a 5825U unit (“an eight-core processor clocked at 2.0 GHz base and 4.5 GHz boost,” with “16GB of DDR4-3200 RAM” in single channel). CPU-Z returned a single-threaded score of 527.6, and Cinebench 2024 scored “82 pts for the single core benchmark, and 495 pts for multi-core.” During the roughly 11-minute Cinebench multi-core run he watched the all-core boost start around 4.1 GHz while the average core temperature “maxed out at 82 degrees Celsius and kept there for the entirety of the benchmark run”; single-core load stayed cooler, “around 60 degrees Celsius.” Power tracked load closely, peaking “around 43 watts” in multi-core and hovering “around 21 watts” single-core.

He confirmed the storage and cooling story the video reviewers told. The “M.2 SATA SSD is undoubtedly slow with read speed barely over 513 MB/s and write speed significantly under,” and the cooling was effectively inaudible: at arm’s length he “can’t hear the fan running with an ambient noise floor of 39 dBA, measured by Decibel X.” His main technical criticism is that the single-channel 16GB DDR4 limits the integrated Vega GPU, and he frames the Zen 3 silicon as “even two generations older than the 12th gen i7,” steering graphics-minded buyers toward newer 7000-series APUs with Radeon 780M and DDR5. For its intended use he is positive: priced under $300, he calls it “a cost-effective workhorse for office environments.”

Tom’s Guide (Anthony Spadafora) on the PRO 5875U Variant

Anthony Spadafora reviewed the PRO 5875U configuration for Tom’s Guide, running it as a daily driver for about a month and concluding it is “a budget mini PC that punches above its weight.” He notes the “Ryzen 7 PRO 5875U CPU with 8 cores, 16 threads, 16MB of L3 cache” that “can reach as high as 4.5GHz” alongside Radeon RX Vega 8 graphics, and praises the near-silent operation: in daily use “it’s been almost completely silent,” and even listening closely the fan “isn’t anything like the much louder one” on a competing mini PC.

His measured points reinforce the same two weak spots. Gaming is modest: in Sid Meier’s Civilization VI: Gathering Storm the E3B “was only able to reach 19 fps at 1080p (10 fps at 4K).” Storage again drew criticism: the “included 512GB Netac G537N M.2 SSD has a max sequential read speed of 560 MBps and a max sequential write speed of 520 MBps,” but in a 25GB file copy test the drive “had a write speed of 449 MBps,” with noticeable slowdowns under heavy multitasking. At sale prices as low as $269 he still rates it strong value for productivity.

TechfulGoodies on the Ryzen 5 7430U Gaming Variant

Carl at TechfulGoodies looked at the 32GB/512GB E3B built on the Ryzen 5 7430U, which (unlike the 16GB units) runs its RAM in dual channel and ships an NVMe drive. He is candid that “you’re not going to be playing high-end games, which is fine. That’s not why you buy this particular mini PC.” His gameplay testing puts numbers to that: PGA Tour 2K23 ran “about a 29 frame per second” at default settings, but enabling AMD FSR upscaling (Performance mode, Medium quality) pushed it to “a solid 60 frames per second.” More demanding titles topped out lower, with Elden Ring and Hogwarts Legacy both sitting “about 30 frames per second” on low settings. He frames the E3B as an entertainment-center or office machine that can also handle light esports, not a AAA gaming box.

korguenkomodo’s Real-World Workload Test (Spanish-language)

In a Spanish-language review, korguenkomodo put a 5825U E3B through everyday tasks rather than synthetic benchmarks. He reports the chip running from 2.0 GHz up to 4.5 GHz within a 15W to 28W envelope, handling web browsing, two simultaneous YouTube streams, and external-drive file transfers without stutter, and he never felt the unit get warm during the session. His most concrete data point is a video-editing comparison: the same project that rendered in roughly 9 minutes on a MacBook M2 took about 35 minutes on the E3B, which he attributes to the slow internal SSD (he estimates the M2’s storage is around four times faster). He also confirms the headline connectivity (triple 4K output, Wi-Fi 6, and a USB-C port rated for 10Gbps transfers at 4K/60Hz) and the expandability to 64GB of RAM. His overall take is positive on the chassis, ports, and processor, with the slow stock SSD as the one real complaint.

Customer Reviews of the KAMRUI E3B

Across 189 ratings on Amazon, the KAMRUI E3B averages 4.3 stars, and the spread matters here: about 69 percent leave five stars while roughly 10 percent leave a single star, so owner sentiment is genuinely divided. The positive reviews tend to praise the same things: a compact footprint, quick boot times, and easy multi-monitor setups for everyday work and media. Marc G., a verified buyer, summed up that camp with one caveat about the bundled storage, writing “If you get it on sale it is a great little pc for media and light gaming.” Several five-star reviewers also called out responsive seller support when they emailed for setup help.

The negative reviews are not noise, and they name real problems rather than vague gripes. SARAH STAR, a verified buyer who rated it three stars, found it underpowered for her son’s gaming: “Slower than I expected and not that great for gaming.” More seriously, a verified buyer named Anik dropped to a low rating after the unit failed around five months in with repeated blue screens and reboots during video playback (he raised the score back to four stars only because the seller issued a full refund), and a one-star verified review from James reports a unit that “won’t stay on for more than 15 minutes before just turning off.” If you buy this machine, the reliability tail and the modest stock SSD are the things owners flag most.

Read more owner reviews on Amazon.

Conclusion: Who Should Consider the KAMRUI E3B Mini PC?

The KAMRUI E3B Mini PC is a versatile option for users seeking a compact, capable device for general computing tasks. Its AMD Ryzen 7 PRO 5850U processor, expandable RAM, and triple 4K display support make it ideal for professionals, students, and home office users who need a reliable and space-saving solution. Its Wi-Fi 6 and Bluetooth 5.2 connectivity also ensure smooth integration into modern setups.

That said, users with intensive creative workflows, such as video editing or 3D rendering, might find the internal SSD’s slower speeds a limiting factor. Gamers or those requiring fanless systems may also want to explore other options. For those who need a balance of performance, expandability, and compact design, the KAMRUI E3B offers a solid choice. To explore more Mini PCs and compare features, visit Starry Hope’s Mini PC Comparison Tool.

Frequently Asked Questions