KAMRUI AM21

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, and the Radeon 780M graphics alongside it cover productivity work and 1080p gaming in many titles. KAMRUI sells it in two configurations: 32GB of DDR5-5600 with a 1TB PCIe 4.0 NVMe SSD, and 16GB with a 512GB SSD.

Pros and Cons

KAMRUI AM21 Comparison Chart

	KAMRUI AM21	KAMRUI AM21
Price	List Price: $759.99 Amazon Prices: Check Price on Amazon	List Price: $759.00 Amazon Prices: Check Price on Amazon
Version	32GB/1TB/Ryzen 7 8745HS	16GB/512GB/Ryzen 7 8745HS
Performance Rating	5.7	5.3
Operating System	Windows 11 Pro	Windows 11 Pro
Processor	Octa-core 3.80 Ghz (max 4.90 Ghz) AMD Ryzen 7 8745HS	Octa-core 3.80 Ghz (max 4.90 Ghz) AMD Ryzen 7 8745HS
GPU	Integrated AMD Radeon 780M	Integrated AMD Radeon 780M
RAM	32 GB DDR5 SO-DIMM	16 GB DDR5 SO-DIMM
Internal Storage	1 TB	512 GB
Dimensions width x length x thickness	4.69 x 4.69 x 1.46 inches (119.13 x 119.13 x 37.08 mm)	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)	1.03 lbs (0.47 kg)
WiFi	Wi-Fi 6 (802.11ax)	Wi-Fi 6 (802.11ax)
Bluetooth	Bluetooth 5.2	Bluetooth 5.2
Ethernet	2 Ethernet ports at 2.5 Gbps	2 Ethernet ports at 2.5 Gbps
HDMI	2 Full-Size HDMI Ports	2 Full-Size HDMI Ports
DisplayPort	1 DisplayPort (DP 1.4)	1 DisplayPort (DP 1.4)
VGA	No VGA Ports	No VGA Ports
USB Ports	4 USB 3, 2 USB-C (1 USB4) 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	4 USB 3, 2 USB-C (1 USB4) 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	No
OCuLink	No	No
Internal SATA Ports	No SATA ports	No SATA ports
Card Reader	No Card Reader	No Card Reader
Headphone Jack	3.5mm combo	3.5mm combo
Fanless	No	No
VESA Mount	Yes	Yes
In the Box	Power adapter (19V/4.74A, 90W), VESA bracket, user manual	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)	RAM: 2x SO-DIMM DDR5-5600 slots (max 96GB); Storage: 2x M.2 2280 PCIe 4.0 NVMe slots (max 4TB total)

A 45W Zen 4 chip with four display outputs

The chassis measures roughly 4.7 x 4.7 x 1.5 inches (119mm x 119mm x 37mm) and weighs just over a pound, so it sits on a desk without crowding it or mounts behind a monitor on the included VESA bracket. Ventilation is sized for the 45W sustained TDP of the Ryzen 7 8745HS: triple copper heat pipes and a 95mm fan hold temperatures down and stay quiet under normal workloads.

The 8745HS has headroom for content creation and light editing on top of office work. The 32GB build keeps demanding multitasking smooth, and its 1TB PCIe 4.0 SSD gives quick boots and app launches; the 16GB/512GB build covers office work and lighter loads. Both SO-DIMM slots and both M.2 2280 slots are user-accessible, so the machine can grow to 96GB of RAM and 4TB of NVMe storage.

The USB4 port carries 40Gbps data, 8K video output, and 100W power delivery on one connection, and 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

No independent hands-on lab review of the AM21 has been published. PCWorld and Windows Central both covered it as a discount pick, so their comments speak to value and broad capability more than to measured performance.

PCWorld on value and upgrade room

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 weighed it against a Steam Machine

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

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.

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.

Strong CPU performance, with Wi-Fi and heat caveats

The KAMRUI AM21 (Ryzen 7 8745HS) suits a home office that also handles content creation, light editing, and 1080p gaming, and the USB4 port with quad-display output covers a multi-monitor desk. The Radeon 780M is capable for an iGPU and no match for a discrete card, so it does not stand in for a gaming rig or a 3D-rendering workstation.

The stock Wi-Fi card can disconnect, and the machine runs hot under sustained heavy load. Wired networking sidesteps the first, since the AM21 carries a 2.5GbE and a 1GbE port, and the second matters most to buyers planning long all-core workloads. To compare it with other models, use Starry Hope’s Mini PC Comparison Chart.

Frequently Asked Questions