# What is the quietest mini PC with expandable storage available? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What is the quietest mini PC with expandable storage available?

## Products

### MINISFORUM AI X1
```yaml
product: minisforum-ai-x1
brand: MINISFORUM
price_gbp: 960.33
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
ram: Up to 64GB DDR5-5600
cpu_model: AMD Ryzen 7 260
usb_ports: 2 x USB 3.2 Gen 2 Type-A, 2 x USB4 40Gbps, 1 x USB 2.0 Type-A
dimensions: 128 x 126 x 52mm
storage_size: Up to 8TB
expandable_storage_slots: 2 x M.2 2280 NVMe SSD slots
```

- **Price:** £960.33 [^1]
- **Summary:** The MINISFORUM AI X1 is a compact mini PC with an AMD Ryzen 7 260 processor, dual USB4 ports, Wi-Fi 7, and support for up to 64GB of DDR5 memory. Its dual M.2 NVMe slots allow substantial storage expansion, making it suitable for productivity, multitasking, light gaming, and compact workstation setups.
- **Ideal For:** The AI X1 suits users seeking a quiet mini PC with expandable storage because its silent cooling system is designed for stable 65W performance and its two M.2 2280 NVMe slots support up to 8TB of storage.

### Beelink SER9 H255
```yaml
product: beelink-ser9-h255
brand: Beelink
price_gbp: 721.84
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
ram: 32GB LPDDR5X 6400MT/s
cpu_model: AMD Ryzen 7 H 255
usb_ports: 2 x USB 2.0, 3 x USB 3.2 10Gbps, 1 x USB4 40Gbps, 1 x Type-C 10Gbps
dimensions: 135 x 135 x 44.7mm
storage_size: 1TB
operating_system: Windows 11 Pro
expandable_storage_slots: 2 x M.2 2280 PCIe 4.0 x4
```

- **Price:** £721.84 [^2]
- **Summary:** The Beelink SER9 H255 is a compact mini PC with an 8-core AMD Ryzen 7 H 255 processor, 32GB of fast LPDDR5X memory, and a 1TB PCIe 4.0 SSD. Its dual M.2 slots, broad USB connectivity, triple-display support, and quiet MSC2.0 cooling make it suitable for productivity, home labs, multimedia, and light gaming.
- **Ideal For:** It suits users seeking a quiet mini PC with expandable storage because its MSC2.0 vapor-chamber cooling and silent fan support near-silent operation while its two M.2 2280 PCIe 4.0 x4 slots allow storage expansion up to 8TB.
- **Additional Sources:** [^3]

### MINIX Z350-0dB Intel Core i3-N350
```yaml
product: minix-z350-0db-intel-core-i3-n350
brand: MINIX
price_gbp: 871.8
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
ram: 16GB DDR4-3200MHz SO-DIMM
cpu_model: Intel Core i3-N350 Processor
usb_ports: 2 x USB-A 3.2 Gen 2, 2 x USB-A 2.0, 1 x USB-C 3.2 Gen 2
dimensions: 120.8 x 132.7 x 42.9mm
storage_size: 512GB M.2 2280 PCIe 3.0 x4 NVMe SSD
operating_system: Windows 11 Pro
expandable_storage_slots: 1 x M.2 2280 PCIe 3.0 x4 NVMe SSD slot and 1 x TF card slot
```

- **Price:** £871.8 [^4]
- **Summary:** The MINIX Z350-0dB is a fanless mini PC with 16GB of RAM, a 512GB NVMe SSD, and an Intel Core i3-N350 processor. Its silent cooling, dual 4K display support, compact metal case, and expandable storage make it suitable for quiet home offices, media use, digital signage, and business deployments.
- **Ideal For:** It specifically suits users seeking the quietest mini PC with expandable storage because its fanless zero-decibel cooling is paired with an M.2 NVMe slot supporting up to 4TB and a TF card slot supporting up to 2TB.
- **Additional Sources:** [^5]

---
## References & Sources
[^1]: MINISFORUM US Official Store, accessed 2026-09-04. https://store.minisforum.com/products/minisforum-ai-x1-mini-pc
[^2]: Beelink, accessed 2026-09-04. https://www.bee-link.com/products/beelink-ser9-max-amd-ryzen-7-h-255
[^3]: AliExpress, accessed 2026-09-04. https://www.aliexpress.com/w/wholesale-Beelink%20SER9.html
[^4]: PB Tech, accessed 2026-09-04. https://www.pbtech.co.nz/product/IPCMNXZ35001/MINIX-Fanless-MiniPC-NEO-Z350-0dB-Intel-i3--N350-1
[^5]: Centralfield, accessed 2026-09-04. https://centralfield.com/product/18489/minix-z350-0db-fanless-minipc