ACEMAGICIAN S3A H 255

The ACEMAGICIAN S3A H 255 is the 2026 redesign of the ACEMAGICIAN S3A: a vertical tower with an AMD Ryzen 7 H 255 and Radeon 780M graphics. It suits office work, photo and video editing, emulation, and lighter gaming on a desk with little room to spare. ACEMAGIC sells it with 16GB of LPDDR5-6400 soldered to the board, so it cannot be upgraded later, while the older S3A used two DDR5 SO-DIMM slots.

Pros and Cons

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ACEMAGICIAN S3A H 255 Comparison Chart

	ACEMAGICIAN S3A H 255
Price	List Price: $499.00 Amazon Prices: Loading prices...
Version	16GB/512GB/Ryzen 7 H 255
Performance Rating	5.2
Operating System	Windows 11 Pro
Processor	Octa-core 3.80 Ghz (max 4.90 Ghz) AMD Ryzen 7 H 255
GPU	Integrated AMD Radeon 780M
RAM	16 GB LPDDR5, 2-channel (Soldered LPDDR5-6400)
Internal Storage	512 GB NVMe SSD (PCIe 4.0)
Dimensions width x length x thickness	2.83 x 5.31 x 6.41 inches (71.88 x 134.87 x 162.81 mm)
Weight	unknown
WiFi	Wi-Fi 6E (802.11ax)
Bluetooth	Bluetooth 5.2
Ethernet	1 Ethernet port at 2.5 Gbps
HDMI	1 Full-Size HDMI Port
DisplayPort	1 DisplayPort (DP 2.0 (4K120); DP Alt Mode via USB4)
VGA	No VGA Ports
USB Ports	6 USB 3, 1 USB-C (1 USB4) Front: USB4, 2x USB-A 10Gbps. Rear: 4x USB-A 5Gbps
Thunderbolt Ports	No
OCuLink	No
Internal SATA Ports	No SATA ports
Card Reader	No Card Reader
Headphone Jack	combo
Fanless	No
VESA Mount	No
In the Box	Mini PC, 19V 120W power adapter, HDMI cable, manual
Expandability	Storage only: 2x M.2 2280 PCIe 4.0 (up to 4TB). RAM is soldered.

Chassis, ports, and the performance dial

The S3A H 255 stands upright and measures about 5.3 by 2.8 by 6.4 inches. The side panel has a triangle-cut grille with RGB lighting behind it. A horizontal cylinder runs across the top, with the power button and a knurled dial at its front end. The dial selects ACEMAGIC’s three power modes: Silent at 20 to 35W, Auto at 30 to 45W, and Performance at 40 to 54W.

The front face holds a USB4 Type-C port with DisplayPort output, two 10Gbps USB-A ports, and a headphone jack. The back has four 5Gbps USB-A ports, the 2.5GbE port, a DisplayPort 2.0 output, an HDMI port, and the DC input for the 19V power adapter. ACEMAGIC rates the DisplayPort and USB4 outputs for 4K at 120Hz, and all three ports can drive 4K displays at once. Wireless is Wi-Fi 6E with Bluetooth 5.2. The box holds a 120W power adapter, a short HDMI cable, and a manual, with no VESA bracket.

A magnetic cover pops off to reach two M.2 2280 slots, both PCIe 4.0, with room for up to 4TB in total. The included 512GB SSD sits in one of them. There is no SATA connector, and the 16GB of memory is soldered as two 8GB LPDDR5-6400 packages, so storage is the only upgrade.

Processor, graphics, and memory

The Ryzen 7 H 255 belongs to AMD’s Ryzen 200 series from 2025. It pairs eight Zen 4 cores and 16 threads with Radeon 780M graphics, the same core and graphics design that powered many 2024 mini PCs. Its PassMark CPU Mark of about 28,700 puts it well above budget Intel N-series and older Ryzen 5000 boxes, though newer Ryzen AI chips with Radeon 880M or 890M graphics are faster in games.

The Radeon 780M has 12 compute units at up to 2.6GHz and borrows system memory for video memory. Games, the browser, and creative apps all share the same 16GB pool.

Reviewer Insights

Michael Noble

Michael Noble’s review tested a unit ACEMAGIC sent him and confirms the Ryzen 7 255 with Radeon 780M, 16GB of memory at 6,400MT/s, and a 512GB NVMe SSD. He opened with gaming and changed his usual advice: “Normally, these mini PCs are just terrible for gaming, and I have literally said in every other mini PC video that I’ve made, ‘Don’t buy a mini PC for gaming.’ But honestly, nowadays, it’s not a bad choice.” He said modern Unreal Engine 5 games at max settings and native resolution are out of reach, and that dropping the resolution and turning on FSR upscaling gives playable frame rates. On emulation: “Where this mini PC really shines is emulation.”

For creative work he edited the review itself on the S3A: “Video editing, this entire video will be edited on this mini PC, shot in 4K. It handles video editing extremely well.” He advised working with low-resolution proxy files on the timeline, and he called photo editing excellent. For music production he warned that the 16GB of memory limits large sample libraries.

Opening the case, he found the memory soldered: “Come to find out, apparently, the RAM is actually soldered onto the motherboard. So, the only thing you can upgrade on this is the storage. That sucks considering this model only ships with 16 gigs.” He also noted the missing SATA port. The BIOS offers almost no settings, with no fan, CPU, or memory control, so the dial on top is the only way to change the fan behavior. On noise: “This thing is dead silent even on performance mode. It’s really really quiet.” He did not see the unit go above about 72C during heavy gaming.

He mentioned that some of the brand’s earlier mini PCs shipped with malware and advised a clean reinstall of Windows or Linux on any computer bought online. He also called the machine a little pricey for 16GB of memory and 512GB of storage.

Game Roujin Channel (in Japanese)

Game Roujin Channel’s review is in Japanese, so the points below paraphrase his narration. It covers the Japanese 16GB/1TB configuration, supplied by ACEMAGIC. CPU-Z in the video reports the Ryzen 7 255 with Radeon 780M, 8 cores and 16 threads, and two 8GB Samsung LPDDR5 packages. He weighed the unit at about 1.5 pounds (686g) and listed the adapter as 19V and 120W. The unboxing shows the PC, the adapter and power cord, a short HDMI cable, and a manual.

He described the dial as three positions: blue for the lowest power, green for the middle setting, and red for the high-power mode. CPU-Z showed its TDP field fixed at 45W in every position; he concluded that the dial changes the CPU’s sustained and short-boost power limits instead. His benchmark scores rose from Silent to Auto to Performance, but the step from Auto to Performance was small, so he recommends leaving the dial on Auto. Shortly after boot, Windows 11 already used about 25% of the 16GB, and he said 32GB would have been the ideal amount.

For games, he expects most emulators to run, apart from heavy, unfinished ones such as Xbox and Xbox 360 emulators, and said most PS3 games should run. He expects older open-world PC games to run with settings raised a little. Street Fighter 6 was playable only at its lowest settings, and he warned that the newest 3D games either do not run or need the lowest settings.

Jitsuroku! Musume no Sumaho (in Japanese)

Jitsuroku! Musume no Sumaho’s review is also in Japanese and covers the 16GB/1TB configuration. He read the dial positions as 35W for Silent, 45W for Auto, and 50W for Performance (ACEMAGIC’s ranges top out at 35W, 45W, and 54W), and the dial can be turned while the PC is running. He said the case is meant to stand upright and does not support VESA mounting. A magnetic cover gives access to the SSD and the empty second M.2 slot, while the LPDDR5 memory cannot be replaced.

At idle on Auto, the PC drew about 10W, and the fan was inaudible against the 36dB room. In a Final Fantasy benchmark at its standard laptop quality preset, the PC scored 5,093 on Auto and 5,242 on Performance. Power draw during the benchmark peaked at about 80 to 90W, and the fan reached about 39 to 41dB, which he still called quiet. The Dragon Quest benchmark gave it a Very Comfortable rating, Speedometer 3.0 scored 25.1, and the SSD read at about 7,000MB/s and wrote at about 6,100MB/s. After the benchmark runs, the CPU had peaked at 85.4C with no thermal throttling, and it boosted to 4.9GHz. He recommends the balanced Auto mode for most use, and said Silent is enough for office work and video playback.

Who the S3A H 255 fits

Pick it for a small desk that needs a quiet machine for office work, photo and video editing, three monitors, and emulation or lighter games. The USB4 port takes a fast external drive or a dock.

Anyone who works with large sample libraries or runs several virtual machines at once should choose a mini PC with SO-DIMM slots or more memory from the factory. The original ACEMAGICIAN S3A with the Ryzen 7 8745HS takes DDR5 SO-DIMMs in two slots. The Mini PC Comparison Chart lines it up against other Radeon 780M machines.

Upgrades

Accessories that fit the ACEMAGICIAN S3A H 255's USB4 or Thunderbolt ports.

eGPU enclosureRazer

Core X V2

A Thunderbolt 5 enclosure that Razer lists as working with Thunderbolt 4 and USB4 hosts; it fits a four-slot card and needs an ATX power supply.

List price $349.99

Buying options

eGPU enclosureMinisforum

DEG2 eGPU Dock

Connects over USB4 or Thunderbolt 5, with an OCuLink input behind a switch, and adds an M.2 slot; it needs an ATX or SFX power supply.

List price $259.90

Buying options

eGPU enclosureSonnet

Breakaway Box 850 T5

Has an 850W power supply built in, so only the graphics card is extra, and works with Thunderbolt 4 and USB4 Windows PCs.

List price $599.99

Buying options

Thunderbolt/USB4 dockCalDigit

TS4 Thunderbolt 4 Dock

An 18-port dock that CalDigit lists for Thunderbolt 4 and USB4 hosts, with 2.5GbE and a DisplayPort 1.4 output.

List price $379.99

Buying options

Thunderbolt/USB4 dockPlugable

TBT4-UD5 Thunderbolt 4 Dock

Two HDMI ports drive two 4K60 monitors from one Thunderbolt 4 or USB4 port on a Windows PC.

List price $199.95

Buying options

Thunderbolt/USB4 dockUGREEN

Revodok Max 208 Thunderbolt 4 Dock

Adds three Thunderbolt 4 ports for dual 4K60 displays plus gigabit Ethernet; it has no HDMI port, so monitors connect over USB-C or an adapter.

List price $169.98

Buying options

Frequently Asked Questions