MINISFORUM UM690S

Updated on June 20, 2026

The MINISFORUM UM690S is a small AMD mini PC built on the Ryzen 9 6900HX, an 8-core, 16-thread Zen 3+ chip (3.3GHz base, 4.9GHz boost) with integrated Radeon 680M graphics. It takes up to 64GB of DDR5, runs Windows 11, and pairs a capable iGPU with a full port set: USB4, USB-C 3.2, four USB-A, dual HDMI (4K60), 2.5GbE, Wi-Fi 6, and Bluetooth 5.2. The “S” in the name marks a redesigned cooler (dual fans plus liquid metal) over the original UM690, which lets it hold higher TDP settings.

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MINISFORUM UM690S Comparison Chart

	MINISFORUM UM690S	MINISFORUM UM690S	MINISFORUM UM690S
Price	List Price: $599.99 Amazon Prices: Check Price on Amazon	List Price: $629.00 Amazon Prices: Check Price on Amazon	List Price: $689.90 Amazon Prices: Check Price on Amazon
Version	32GB/512GB/AMD Ryzen 9 6900HX	32GB/1TB/AMD Ryzen 9 6900HX	64GB/1TB/AMD Ryzen 9 6900HX
Performance Rating	8.5	8.5	8.8
Operating System	Windows 11	Windows 11	Windows 11
Processor	Octa-core 3.30 Ghz (max 4.90 Ghz) AMD Ryzen 9 6900HX	Octa-core 3.30 Ghz (max 4.90 Ghz) AMD Ryzen 9 6900HX	Octa-core 3.30 Ghz (max 4.90 Ghz) AMD Ryzen 9 6900HX
GPU	Integrated AMD Radeon 680M	Integrated AMD Radeon 680M	Integrated AMD Radeon 680M
RAM	32 GB	32 GB	64 GB
Internal Storage	512 GB	1 TB	1 TB
Dimensions width x length x thickness	5.04 x 5.04 x 2.2 inches (128.02 x 128.02 x 55.88 mm)	5.04 x 5.04 x 2.2 inches (128.02 x 128.02 x 55.88 mm)	5.04 x 5.04 x 2.2 inches (128.02 x 128.02 x 55.88 mm)
Weight	unknown	unknown	unknown
WiFi	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
Ethernet	1 Ethernet port at 2.5 Gbps	1 Ethernet port at 2.5 Gbps	1 Ethernet port at 2.5 Gbps
HDMI	2 Full-Size HDMI Ports	2 Full-Size HDMI Ports	2 Full-Size HDMI Ports
DisplayPort	DisplayPort provided by USB-C	DisplayPort provided by USB-C	DisplayPort provided by USB-C
VGA	No VGA Ports	No VGA Ports	No VGA Ports
USB Ports	4 USB 3, 2 USB-C (1 USB4) USB4 interface supports delivering power and DisplayPort output	4 USB 3, 2 USB-C (1 USB4) USB4 interface supports delivering power and DisplayPort output	4 USB 3, 2 USB-C (1 USB4) USB4 interface supports delivering power and DisplayPort output
Thunderbolt Ports	No	No	No
OCuLink	No	No	No
Internal SATA Ports	1 SATA port, includes 2.5" drive bay (Support for a 2.5 inch drive)	1 SATA port, includes 2.5" drive bay (Support for a 2.5 inch drive)	1 SATA port, includes 2.5" drive bay (Support for a 2.5 inch drive)
Card Reader	No Card Reader	No Card Reader	No Card Reader
Headphone Jack	combo	combo	combo
Fanless	No	No	No
VESA Mount	Yes	Yes	Yes
In the Box	UM690S Mini PC, HDMI Cable, VESA Bracket, Screws, Anti-slip rubber, Manual, 120 watt power supply, additional cable to add a SSD drive	UM690S Mini PC, HDMI Cable, VESA Bracket, Screws, Anti-slip rubber, Manual, 120 watt power supply, additional cable to add a SSD drive	UM690S Mini PC, HDMI Cable, VESA Bracket, Screws, Anti-slip rubber, Manual, 120 watt power supply, additional cable to add a SSD drive
Expandability	RAM upgradeable and multiple SSDs can be added	RAM upgradeable and multiple SSDs can be added	RAM upgradeable and multiple SSDs can be added

A liquid-metal cooler and room for three drives

MINISFORUM redesigned the cooling for the S model. ETA Prime confirmed on camera that Minisforum added dual fans and “implemented liquid metal,” which is what lets the UM690S sustain a higher combined CPU-plus-GPU power limit (he measured 70 watts out of the box). The same 6900HX shows up in rivals like the Beelink SER6 6900HX. Storage runs to two M.2 2280 PCIe 4.0 slots plus a 2.5-inch SATA bay, and the DDR5 sits on two SODIMM slots that go up to 64GB. Minisforum bundles an extra cable for adding the 2.5-inch drive.

Reviewer Insights

The 6900HX is AMD’s Zen 3+ “Rembrandt” silicon from 2022, with a PassMark multi-thread score around 24,900. It sits a generation or two behind the Zen 4 (7840HS, 8845HS) and Zen 5 mobile APUs, and its RDNA2 680M graphics rank below the later 780M (RDNA3) and 890M parts. Both reviewers below tested the Ryzen 9 6900HX configuration with 32GB of DDR5.

ETA PRIME: 3,089 in Time Spy, within reach of the Z1 Extreme

ETA PRIME ran his review on a 32GB DDR5 unit (dual channel at 4800 MHz) with the Radeon 680M clocking up to 2400 MHz. He opens by saying, “I’ve been doing some testing with this chip I’m really impressed by what this thing can do,” and credits the redesign: “the main claim to fame to the S variant we have here is the new cooling system.” Out of the box he measured the combined CPU plus GPU power limit at 70 watts. At the wall, plugged into a kilowatt meter, he logged 19 watts average at idle, around 84 watts while gaming, and 112 watts during an extreme stress test that maxed the iGPU and all eight cores at once (comfortably under the bundled 120-watt supply). During Forza Motorsport at 900p low, the APU’s Radeon boost pushed to roughly 80 watts while the iGPU held its 2400 MHz clock, and temperatures stayed clear of the 95C throttle point.

On the GPU benchmarks, his 3DMark runs landed at 7,756 in Fire Strike and 3,089 in Time Spy, the latter within reach of the newer RDNA3 Z1 Extreme’s roughly 3,300 Time Spy result. In-game, at the settings he chose, the 680M averaged 62 FPS in Shadow of the Tomb Raider (1080p, 75% resolution scale), 81 FPS in Spider-Man Remastered (720p), 88 FPS in Forza Horizon 5 (1080p medium), 68 FPS in God of War (900p, FSR Performance), and 74 FPS in Cyberpunk 2077 (1080p low, FSR Performance). He notes the Cyberpunk figure is only a few frames behind the RDNA3 780M, which managed about 78 FPS at around 50 watts in a ROG Ally, and concludes that the Zen 3+ part trails Zen 4 on the CPU side while the graphics “are definitely keeping up especially with those new AMD drivers.” He did not report a fan-noise figure in decibels.

Madlittlepixel saw one Switch title stuck at 54 FPS

Madlittlepixel’s review approaches the UM690S as a retro-emulation machine. He tested a 32GB DDR5 (dual 16GB) / 1TB SSD unit and posted a 3DMark Night Raid score of 27,297, which he called “one of the higher scores I’ve gotten on any of these mini PCs.” He calls it early on, “this thing’s going to be a little beast,” then runs an emulation gauntlet, reporting that PlayStation 1, Nintendo DS, Sega Saturn, Nintendo 64, PlayStation 2, PlayStation 3 (Soulcalibur, After Burner Climax), PSP, GameCube, Wii, and Wii U all ran without trouble. For Switch he played Mario Odyssey and saw it “capped at like 54 frames per second,” which he attributed to the emulator or the game rather than the hardware. On the PC side he found Spider-Man “ran decently well at high settings” and steadier once dropped to medium.

He also walks the chassis: four air vents, dual fans beneath the board, and a separate CPU fan on top, plus the barebones buying option that he said starts around $350 on sale for owners bringing their own RAM and SSD. His verdict is a recommendation with the caveat that cheaper Minisforum units exist for lighter needs: “cool little PC that I could recommend.” He gave no decibel reading either, so the loudness of the redesigned cooler goes unmeasured in both videos.

Customer Reviews

Amazon buyer reviews split between strong five-star reports and a cluster of one-star complaints. Lintner, a verified five-star buyer who does gaming and video editing, called it “Truly a great little PC for people who need higher spec computers but don’t have the budget, time, or skills to” build their own, and another verified five-star buyer, Taeko, said games “run great” and recommended it. Kent De Groff, also a verified five-star purchase, was after a fast CPU and SSD and got it, though it took a second order to land a quiet one after his first unit had an extremely noisy fan.

Three named owners report the system crashing and rebooting on its own. WDP, a one-star buyer, wrote “It works great until it crashes and auto-restarts. It could happen at any time.” The same problem shows up in a middle-rated review: P. Rey, a three-star verified buyer, praised the “very good performance” but said “About 50% of the time, reboots lead to an ‘automatic recovery.’” Among the one-star reviews, layntrack described overheating under load (“The processor overheats and shuts down”), and J M reported a unit that simply “Stopped working April 2026” with unresponsive Minisforum support. Several owners say the trouble started early. If you buy one, test it hard inside Amazon’s 30-day return window.

Worth buying for the graphics if you test it inside the return window

The reason to buy is the graphics: the redesigned liquid-metal cooler lets the 6900HX hold a higher TDP, and both reviewers measured playable 1080p frame rates in current titles. USB4 and 2.5GbE keep the port set current.

The fan can get loud, and one owner needed a second unit to get a quiet one. For 0dB computing a fanless mini PC like the MINIX Z100-0dB is the alternative, at lower performance. The Amazon sample is small (14 ratings) but carries repeated stability complaints (random crashes and auto-recovery loops), so run a unit through a few days of real use before the return period ends. The Mini PC Comparison Chart lists the 6900HX alongside other mini PC processors.