# What are the quietest compact desktop PCs available? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What are the quietest compact desktop PCs available?

## Products

### GMKtec K12 NucBox H 255
```yaml
product: gmktec-k12-nucbox-h-255
brand: GMKtec
price_gbp: 226.51
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
ram: 32GB
cpu_model: AMD Ryzen 7 H 255
dimensions: 154 x 151 x 73.6 mm
storage_size: 512GB
graphics_card: AMD Radeon 780M Graphics 12 Cores
operating_system: Windows 11 Pro
number_of_usb_ports: 6
```

- **Price:** £226.51 [^1]
- **Summary:** GMKtec K12 NucBox H 255 is a compact mini PC built around an AMD Ryzen 7 H 255 with an integrated AMD Radeon 780M iGPU and supports simultaneous multi-display output. It comes with DDR5 RAM and an NVMe SSD option, and includes an Oculink port for adding an external GPU. It runs Windows 11 Pro and is intended for desktop replacement use in home office, productivity, and other multitasking workloads.
- **Ideal For:** For the quietest compact desktops, the K12's small, efficient vapor-chamber cooling design is paired with a Ryzen 7 H 255 class system designed for low-noise performance modes (quiet mode capability), while keeping a compact 154 x 151 x 73.6 mm footprint with integrated Radeon 780M graphics to avoid GPU fan noise.
- **Additional Sources:** [^2], [^1], [^2]

### Asus NUC 14 Pro AI Ultra 7 155H
```yaml
product: asus-nuc-14-pro-ai-ultra-7-155h
brand: Asus
price_gbp: 496.08
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
cpu_model: Intel Core Ultra 7 Processor 155H
dimensions: 117 x 112 x 37 mm
```

- **Price:** £496.08 [^3]
- **Summary:** ASUS NUC 14 Pro is a compact mini PC built around an Intel Core Ultra 7 155H with integrated graphics. It supports dual HDMI 2.1 displays and includes Thunderbolt 4 for high-speed peripheral connectivity. The configuration is designed for small workspaces while still offering multiple display and I/O options.
- **Ideal For:** Its compact 117 x 112 x 37 mm design plus low-power Intel Core Ultra 7 155H platform makes it suitable for quieter operation in a small desktop PC form factor.
- **Additional Sources:** [^4], [^5], [^3], [^4], [^5]

---
## References & Sources
[^1]: GMKtec UK, accessed 2026-06-23. https://www.gmktec.uk/products/gmktec-nucbox-k12-amd-ryzen%E2%84%A2-7-h-255-mini-pc
[^2]: Newegg, accessed 2026-06-23. https://www.newegg.com/gmktec-barebone-systems-mini-pc-amd-ryzen-7-k12-32-512/p/2SW-007C-00009
[^3]: ASUS, accessed 2026-06-23. https://www.asus.com/nz/displays-desktops/nucs/nuc-mini-pcs/asus-nuc-14-pro/techspec/
[^4]: CDW, accessed 2026-06-23. https://www.cdw.com/product/asus-nuc-14-pro-kit-rnuc14rvhu70000ui-mini-pc-core-ultra-7-155h-1.4-ghz/7888566
[^5]: Newegg, accessed 2026-06-23. https://www.newegg.com/asus-barebone-systems-mini-pc-intel-core-ultra-7-rnuc14rvhu700000i/p/2SW-000N-000A6