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The ASRock DeskMini A300 remains an unusually flexible 1.92-liter DIY PC, but it is a used-market project in 2026, not a current plug-and-play bargain. It makes sense when you can buy a complete, tested unit cheaply, verify the exact APU and BIOS compatibility, and are happy with integrated graphics. Add up the processor, DDR4 SO-DIMMs, storage, cooler, Wi-Fi and any missing cables before deciding: an incomplete A300 can quickly cost more than a newer mini PC.
What the DeskMini A300 is—and is not
The A300 is a barebone mini PC built around a socketed AMD AM4 motherboard. It supplies the compact chassis, motherboard and an external 120 W, 19 V power adapter, but a barebone package does not necessarily include an APU, memory, storage, Wi-Fi or an operating system. Confirm the contents of the specific listing rather than assuming it is ready to use.
ASRock’s A300W variant is listed with an Intel AC-3168 Wi-Fi kit; the standard A300 may not include wireless hardware. Check that the module, antenna leads and antennas are present if Wi-Fi or Bluetooth matters. The A300 is not a conventional desktop with room for a graphics card: it has no PCIe expansion slot, and video comes from the installed APU’s integrated graphics.
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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallASRock’s official A300 specifications describe a 155 × 155 × 80 mm, 1.92-liter system using a Mini-STX motherboard. Optional accessories include VESA mounting, an RGB strip and a USB hub. The tiny footprint is the appeal; limited expansion and a small number of rear ports are the trade-offs.
#1 Best Overall
- Ultra-Compact 1.92L Form Factor: A complete barebone kit for building an incredibly space-saving desktop PC, measuring just 1.92 liters in volume.
- Versatile AMD AM4 Platform: Designed to support a wide range of AMD Socket AM4 Ryzen 5000/4000/3000/2000 Series processors (up to 65W), offering flexible performance options.
- High-Capacity DDR4 Memory: Features two DDR4 SO-DIMM slots supporting up to 128GB of memory at speeds up to 3200MHz (with compatible Ryzen processors).
- Triple Display Capability: Supports up to three simultaneous displays via 1x HDMI (4K@60Hz), 1x DisplayPort, and 1x D-Sub (VGA) for versatile multi-monitor setups.
- Flexible Storage Options: Includes two Ultra M.2 slots for NVMe SSDs (PCIe Gen3 x4/x2) and two 2.5" drive bays for HDDs/SSDs, supporting RAID 0/1 configurations.
DeskMini A300 specifications
| Feature | Specification |
|---|---|
| Chassis | 155 × 155 × 80 mm; 1.92 L |
| Processor | AM4 APUs in listed Picasso, Raven Ridge and Bristol Ridge families, up to 65 W; check exact CPU and BIOS support |
| Cooler clearance | Up to 46 mm tall |
| Memory | Two DDR4 SO-DIMM slots, non-ECC; ASRock’s current page lists up to 64 GB |
| Storage | Two M.2 2280 positions and two 2.5-inch SATA drive bays |
| Video | HDMI, DisplayPort and D-Sub; ASRock lists HDMI and DisplayPort up to 4K/60 Hz |
| Networking | Gigabit Ethernet; M.2 Key-E 2230 slot for optional Wi-Fi/Bluetooth |
| USB | Front USB-C and USB-A; one rear USB 3.1 Gen1 Type-A and one rear USB 2.0 Type-A |
| Power | External 120 W, 19 V adapter |
ASRock’s current listing says up to 64 GB of memory, although launch-era coverage cited a lower maximum. Treat the current figure as the manufacturer’s present specification, and check the manual and module compatibility before buying memory for an older board.
Which processors work?
“AM4” does not mean every AM4 processor is supported. ASRock specifies the A300 for processors in the Picasso, Raven Ridge and Bristol Ridge families, up to 65 W. Because the platform relies on APU graphics for display, an AM4 CPU without integrated graphics will not provide usable video output. Later chips—including some Ryzen 4000G or 5000G models—should not be assumed compatible based on socket fit or community reports.
Before purchasing a processor, look up its exact model on ASRock’s A300 CPU Support List and confirm the minimum BIOS version. A supported chip can still fail to boot if the board’s installed BIOS is too old, and an older second-hand unit may not have been updated.
- Ryzen 5 2400G: A strong original pairing, with four cores, eight threads and Vega integrated graphics.
- Ryzen 5 3400G: A reasonable later option if the exact board BIOS supports it.
- Ryzen 3 2200G or 3200G: More modest choices for office work and light gaming, subject to support-list confirmation.
- Athlon 200GE-series chips: Lower-cost options for basic desktop, media or lightweight server duties; confirm the exact model.
- Ryzen 7 PRO 4750G and similar later APUs: Treat as support-list-dependent or experimental rather than a default recommendation.
The best APU is the one that makes the complete build affordable. A cheap chassis paired with a scarce or overpriced used processor is not a bargain.
Rank #2
- Ultra-Compact Barebone System: Complete mini-PC kit including chassis and motherboard - just add CPU, memory, storage, and operating system
- Latest Intel Processor Support: Compatible with 14th, 13th, and 12th Gen Intel Core processors (LGA1700 socket) up to 65W TDP
- High-Speed Memory Support: Dual DDR4-3200MHz SO-DIMM slots support up to 64GB for smooth multitasking and responsive performance
- Triple Display Output Options: DisplayPort, HDMI, and D-Sub (VGA) connections support multiple monitor setups for versatile workspace configurations
- Blazing-Fast PCIe 5.0 Storage: Features one Blazing M.2 slot (PCIe Gen5 x4) for next-generation NVMe SSDs with incredible transfer speeds
Memory, storage and wireless
The A300 uses two DDR4 SO-DIMMs—the short laptop-style modules—not desktop UDIMMs. Install a matched pair for dual-channel operation. This is especially important for Vega graphics, which uses system memory: a single module reduces available memory bandwidth and can hold back gaming performance. Two 8 GB modules suit a budget office or light-gaming build; two 16 GB modules provide more room for multitasking or home-lab use. Consider 2 × 32 GB only after confirming the board, BIOS and specific modules are stable together.
ASRock specifies two M.2 2280 slots and two 2.5-inch SATA bays. The M.2 positions support PCIe Gen3 NVMe drives; the second slot drops to Gen3 x2 with Athlon 2xxGE processors, according to the manufacturer’s specification. A modern Gen4 or Gen5 SSD can work only within the platform’s limits, so paying extra for its peak speed offers little benefit here beyond possible reuse in another PC. The 2.5-inch bays accept 7 mm or 9.5 mm drives.
For a used unit, ask whether both SATA cables and the drive mounting hardware are included. Do not assume a bay contains a drive. SATA RAID 0/1 is listed, but RAID 1 only helps keep a system available after some drive failures; it does not protect against accidental deletion, corruption, theft or malware. Keep a separate backup.
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Rank #3
- System Compatibility: Mini-STX (155x155x80mm) barebone; requires LGA1151 CPU, DDR4 SO-DIMM memory, M.2 SSD/2.5" drive, and OS
- Dedicated Support: Contact us through Amazon for any product questions or assistance
- Supports Intel 9th/8th Gen LGA1151 CPUs: Compatible with Intel Core, Pentium, and Celeron processors; supports standard Intel box fans
- Dual DDR4 SO-DIMM Slots: Two SO-DIMM slots support up to 64GB of DDR4 memory for responsive multitasking
- Triple Display Outputs: DisplayPort, HDMI, and D-Sub ports; supports up to two displays simultaneously for flexible productivity
Building and setting up an A300
- Verify the bundle and board. Confirm that the chassis, motherboard, correct 19 V power adapter, SATA cables and mounting parts are included. Ask for the board revision and installed BIOS version if possible.
- Check the processor first. Match the exact APU model to ASRock’s CPU support list and required BIOS. Do not buy a chip solely because it fits the AM4 socket.
- Install the APU and a low-profile cooler. The stated maximum cooler height is 46 mm. Many standard boxed coolers and tower coolers are too tall. A Wraith Stealth may physically fit after removing its top shroud in some configurations, but this is a modification, not a guaranteed fit. Check mounting hardware, fan orientation and clearance before choosing any cooler. The Noctua NH-L9a-AM4 is a possible low-profile option, but verify the specific fit and installation details for your chassis.
- Install matched SO-DIMMs. Use two modules where possible, and check that both are seated correctly.
- Add M.2 and SATA storage. Secure the M.2 drive with the proper screw. Fit any 2.5-inch drive and connect the correct cables if you have them.
- Add wireless hardware if needed. Install the M.2 module and connect the antennas; confirm the kit is complete.
- Boot into firmware before installing an OS. Check that the APU, memory capacity, storage and fan are detected. Set an appropriate boot device and inspect the fan profile.
- Install Windows or Linux, then test. ASRock lists Windows 10 and Windows 11 support for the product, but that does not guarantee identical compatibility across every processor and BIOS combination. Install suitable chipset and graphics drivers, then test sleep/wake, displays, network, memory stability and temperatures.
How fast is it? Historical performance, in context
The best published performance evidence is from 2019, not a fresh test of a system running current software. In its March 2019 DeskMini A300 review, TechSpot tested a Ryzen 5 2400G with DDR4-2133 memory overclocked to DDR4-2933. Results varied by game and settings: Apex Legends ran roughly 60–70 fps at 720p on the lowest settings, with dips; Battlefield V was around 60 fps at 720p low, also with dips into the 50s; and CS:GO was generally near 60 fps at 1080p high, with dips into the 40s. The test also reported roughly 35–45 fps in Far Cry New Dawn at 720p normal, 90–100 fps in Fortnite at 900p low with stutter, about 80 fps in Rainbow Six Siege at 900p low/render scaling and 70–80 fps in Rocket League at 1080p performance settings.
These are historical results from a particular processor, memory configuration, driver environment and game versions—not a promise for another build today. APU graphics depend heavily on memory speed and dual-channel operation, while patches, drivers, firmware and thermal conditions can change frame rates. The useful conclusion is narrower: the A300 can handle older games and lighter titles with lowered settings, but it is not a modern AAA gaming PC.
Display outputs include HDMI, DisplayPort and D-Sub, with ASRock specifying HDMI and DisplayPort up to 4K at 60 Hz and simultaneous triple-display support. Actual resolution and refresh rate depend on the APU, display, cable and software. The high-resolution outputs are useful for desktop and media use; they do not imply the integrated GPU can render demanding games at 4K.
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Cooling is a compromise imposed by the 46 mm cooler limit and small enclosure. In TechSpot’s 2400G configuration, the system drew 82 W during a Blender stress test and 102 W in Battlefield V. With the optional cooler, the reported CPU temperature was 78 °C under load and 33 °C at idle; a Wraith Stealth replacement lowered load temperature by about 4 °C and was described as quieter in that test.
Rank #4
- Input: 100-240V 50-60Hz (for worldwide use)/Output: 19V
- Compatible with: ASRock Mini PC Jupiter B660/TPM B660/DASH/TPM B660/WO_COM H610 X600 X600/DASH
- Compatible with: ASRock Mini PC DeskMini Barebone 110 110/COM 110W 310 310/COM 310W A300 A300W X300 X300W
- Compatible with: ASRock Mini PC DeskMini B660 B660W B760 B760W H470 H470W X600 X600W
- Safety& Reliability: PowerHOOD products has been tested many times for providing protection, featuring overcharging, overheating, overvoltage and short circuit protection, which will charge your devices efficiently and keep you and your devices safe.
Those figures are configuration-specific. Tom’s Hardware also found the A300 compact and efficient, but criticized its warmth and noise under heavy loads in its review. Neither result establishes how every used unit will sound. Cooler choice, fan curve, ambient temperature, dust and thermal-paste condition all matter. A 120 W adapter is adequate for the intended low-power APU system, but it is not a platform for adding a discrete GPU or other high-draw upgrades.
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Front ports include USB 3.1 Gen1 Type-C and Type-A. At the rear are one USB 3.1 Gen1 Type-A port and one USB 2.0 Type-A port, alongside Gigabit Ethernet and the display outputs. Front connections include headphone/microphone and microphone ports. The limited rear USB count can be awkward if the PC sits out of reach or serves as a desktop replacement; a hub may be necessary for peripherals, storage and controllers. Tom’s Hardware also noted the lack of rear-panel audio jacks.
Who should buy the A300?
The A300 still suits a DIY builder who wants a very small secondary computer, an office or media PC, retro-emulation hardware, or a light-gaming system and is comfortable sourcing parts and troubleshooting a used build. Its two M.2 positions and two SATA bays are unusually flexible for its size, making it interesting for a compact home-lab experiment. But Gigabit Ethernet, no ECC memory, modest USB expansion, the external 120 W power limit and potential fan noise make it a poor choice for a serious NAS or demanding always-on workstation. RAID is not a backup.
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Skip it if you need a discrete GPU, modern gaming performance, USB4, 2.5GbE, DDR5, a current warranty, predictable long-term platform support or a ready-to-use system. It is also a poor match for sustained multicore workloads where noise and small-chassis cooling matter.
Best Value
- Two other USB ports
- recessed in a Barebone Asrock Deskmini case
- Required batteries: No
- Made in: China
A300 vs. newer options in 2026
The DeskMini A300’s original appeal was a low barebone price: TechSpot cited about $150 in 2019, and Tom’s Hardware cited about $140/£151. Those launch-era figures are historical context, not today’s value. ASRock cautions that product availability varies by region, and second-hand asking prices do not establish a reliable market average.
- DeskMini X300/X300 2.5G: The more direct AM4 successor to consider for a new build, particularly if you want support for newer APUs or 2.5GbE on an applicable model. Check the exact model’s processor, memory and networking specifications.
- DeskMini X600: A newer AM5 platform for buyers who want DDR5 and a more current upgrade path. Its platform and memory costs may make it a poor fit for a strict low-budget build.
- Modern AMD mini PC: A complete prebuilt system can be the better value when you want a warranty, current wireless and fewer compatibility hurdles.
- Refurbished business mini PC: Often a simpler option for office-only use, though it may not offer the A300’s socketed APU or storage flexibility.
- Mini-ITX or MicroATX desktop: Choose a larger build if you need a conventional graphics-card upgrade path or stronger sustained cooling.
Compare the total cost, not just the barebone: chassis and power adapter, supported APU, two SO-DIMMs, SSD, cooler, Wi-Fi and missing cables, plus any OS license you need. An eBay listing is an asking price, not proof of fair value; inspect photos, included parts, condition and return terms. The A300 wins only if that complete, verified cost is meaningfully below the alternative you would actually buy.
Verdict
The DeskMini A300 was a clever, capable miniature PC for its time and remains a useful DIY platform when bought complete and cheaply. Its socketed APU, dual-channel SO-DIMMs and unusually broad storage options give it more flexibility than many tiny PCs. But in 2026 its age, restricted CPU support, modest I/O and lack of a graphics-card slot are decisive limits. Buy only after verifying the exact processor/BIOS pairing and every included accessory; otherwise, compare a newer DeskMini or a complete mini PC before spending.
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