KAMRUI AM21

Updated on January 26, 2026

The KAMRUI AM21 (Ryzen 7 8745HS) is a compact AMD mini PC that delivers desktop-class CPU performance without a tower. It measures 4.69 inches square and 1.46 inches thick, and the 8-core, 16-thread Zen 4 chip boosts to 4.9GHz with Radeon 780M graphics, enough for productivity, content creation, and smooth 1080p gaming in many titles. The review unit ships with 32GB of DDR5-5600 and a 1TB PCIe 4.0 NVMe SSD, which handles heavy multitasking comfortably.

Pros and Cons of the KAMRUI AM21 (Ryzen 7 8745HS)

KAMRUI AM21 Comparison Chart

	KAMRUI AM21
Price	List Price: $499.98 Amazon Prices: Loading prices...
Version	---
Performance Rating	9.1
Operating System	Windows 11 Pro
Processor	Octa-core 3.80 Ghz (max 4.90 Ghz) AMD Ryzen 7 8745HS
GPU	Integrated AMD Radeon 780M
RAM	32 GB DDR5 SO-DIMM
Internal Storage	1 TB
Dimensions width x length x thickness	4.69 x 4.69 x 1.46 inches (119.13 x 119.13 x 37.08 mm)
Weight	1.03 lbs (0.47 kg)
WiFi	Wi-Fi 6 (802.11ax)
Bluetooth	Bluetooth 5.2
Ethernet	2 Ethernet ports at 2.5 Gbps
HDMI	2 Full-Size HDMI Ports
DisplayPort	1 DisplayPort (DP 1.4)
VGA	No VGA Ports
USB Ports	4 USB 3, 1 USB 4, 2 USB-C USB4 port supports 40Gbps, 8K video, 100W PD; 1x USB-C 3.2 with DP1.4; 2x USB 3.2 Gen2 Type-A (10Gbps); 2x USB 3.2 Gen1 Type-A
Thunderbolt Ports	No
OCuLink	No
Internal SATA Ports	No SATA ports
Card Reader	No Card Reader
Headphone Jack	3.5mm combo
Fanless	No
VESA Mount	Yes
In the Box	Power adapter (19V/4.74A, 90W), VESA bracket, user manual
Expandability	RAM: 2x SO-DIMM DDR5-5600 slots (max 96GB); Storage: 2x M.2 2280 PCIe 4.0 NVMe slots (max 4TB total)

Detailed Insights into the KAMRUI AM21 (Ryzen 7 8745HS)

The AM21 impresses with its sleek, minimalist design that can sit unobtrusively on a desk or mount behind a monitor using the included VESA bracket. The chassis measures 119mm x 119mm x 37mm (roughly 4.7 x 4.7 x 1.5 inches) and weighs just over a pound, making it one of the more portable mini PCs in its performance class. Build quality appears solid, with adequate ventilation to handle the 45W sustained TDP of the Ryzen 7 8745HS processor. The triple copper heat pipe cooling system with a 95mm fan keeps temperatures in check while maintaining relatively quiet operation under normal workloads.

The 8-core, 16-thread Zen 4 chip has real headroom for productivity, content creation, and light editing. PCWorld's deal coverage describes the AM21 handling "streaming, hundreds of browser tabs, multiple apps" at once, with a mention of light video editing. The 32GB of DDR5 keeps demanding multitasking smooth, and the 1TB PCIe 4.0 SSD gives quick boots and app launches.

Connectivity is a strength. The USB4 port handles 40Gbps data, 8K video output, and 100W power delivery in one connection (it is USB4, not Thunderbolt, but it works with Thunderbolt 3 and USB-C accessories). With the dual HDMI 2.1, a DisplayPort 1.4, and a USB-C 3.2 with video, the AM21 can drive up to four displays. Dual Ethernet (one 2.5GbE, one 1GbE), Wi-Fi 6, and Bluetooth 5.2 cover networking, and four USB 3.2 Type-A ports round out the selection.

Reviewer Insights on the KAMRUI AM21 (Ryzen 7 8745HS)

A note on coverage: the AM21 has not drawn a deep, independent hands-on lab review. The videos circulating for it are research-based or script-driven overviews that synthesize spec sheets and aggregated user feedback rather than original testing, so we do not cite them. The two write-ups below are from established publications, though both are deal-coverage pieces rather than full reviews.

PCWorld

PCWorld called the AM21 "a lot of performance packed into a miniscule machine" with value that "is insane with this discount," and noted the upgrade headroom (RAM to 96GB, storage to 4TB). A second PCWorld piece called it "a fantastic price for an impressive device" that handles "streaming, hundreds of browser tabs, multiple apps" at once.

Windows Central

Windows Central framed the AM21 as a budget alternative to a Steam Machine, citing "1080p gaming in many titles" including GTA V, Forza Horizon 5, and Delta Force, plus emulation, at around $489 during promotions.

Customer Reviews of the KAMRUI AM21

Across 47 ratings on Amazon, the KAMRUI AM21 averages 4.1 stars, and the spread tells the real story: 64 percent of buyers leave 5 stars while 13 percent leave a single star, so this is a well-liked unit with a meaningful minority of unhappy owners. The recurring praise is about size, quiet operation, and speed for the money. A verified buyer named Michael wrote "The pc runs quiet and cool while running multiple applications with ease," and a verified buyer named Himself called it "Small, powerful & quiet" while noting it replaced a 10-year-old mini-tower. Several owners single out the AMD Ryzen 7 8745HS and 32GB DDR5 as the value draw.

The complaints are specific and worth knowing before you buy. A verified buyer named KC, who installed Bazzite for Steam gaming, liked the machine overall but flagged the wireless card: "the current one disconnects enough to be annoying," and is replacing it. A verified three-star reviewer named Gene Hood tried to use it for music production and reported "One of the first things I noticed was the overheating of the PC," with KAMRUI support only suggesting a cooling pad. A verified one-star buyer named Nima S. had an easy setup but could not factory-reset the unit when trying to return it. If you plan a quiet, compact desktop for streaming, school, or light work, the feedback is largely positive; sustained heavy loads and the stock WiFi card are the points owners raise most.

Read more owner reviews on Amazon.

Conclusion

The KAMRUI AM21 (Ryzen 7 8745HS) is a strong pick for desktop-class CPU performance in a small box: a fit for a home office, content creation, light editing, and 1080p gaming, with USB4, quad-display support, and upgrade room to 96GB of RAM and 4TB of storage. Owner reviews back the value, with the caveats below.

It is not a dedicated gaming rig or a 3D-rendering workstation; the Radeon 780M is capable for an iGPU but no match for a discrete card. Two owner-reported issues are worth weighing: the stock Wi-Fi card can disconnect, and the unit runs hot under sustained heavy load. For most power users who want strong CPU performance and broad connectivity in a mini PC, it is good value. To compare it with other models, use Starry Hope's Mini PC Comparison Chart.

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