HP ProDesk 405 G8 Mini — Quick Specs Summary
| Component | Specification | Upgradeable? |
|---|---|---|
| Processor | AMD Ryzen Pro (4–8 cores, 3–4.5 GHz) | No |
| RAM | 8GB, 16GB DDR4 SO-DIMM (2 slots, max 64GB) | Yes — UPGRADEABLE |
| Internal SSD | 256GB–512GB M.2 NVMe + optional 2.5″ SATA | Yes — both replaceable |
| Ports | 4× USB-A 3.2, 1× USB-C, HDMI 2.0, Gigabit Ethernet | Expandable via dock |
| Wireless | WiFi 6, Bluetooth 5.1 | No |
| Power Supply | 45W USB-C PD | No |
| Price | £300–450 | N/A |
ProDesk 405 G8 Mini: Budget AMD Professional
Performance & Positioning
AMD Ryzen Pro (older generation, 4–8 cores) with professional support. Budget-friendly for SMBs. 45W power consumption = efficient and quiet.
DDR4 + Hybrid Storage
Budget-friendly DDR4 SO-DIMM + M.2 + 2.5″ SATA. Excellent value for cost-conscious SMB deployments.
RAM & SSD Upgrades
RAM: Factory 8/16GB DDR4. Upgrade to 32GB (£50–80) or 64GB (£100–150).
SSD: M.2 (256–512GB) + optional 2.5″ SATA. Add £35–80 for SATA expansion.
Installation (Standard Process)
- Power down, unplug
- Remove bottom panel
- Push RAM tabs, eject; insert new DDR4
- For M.2: Push at 30°, eject; insert new SSD
- For SATA: Insert into bay, secure screws, connect cable
- Reassemble, boot
Compatible RAM: Crucial DDR4-3200 16GB SODIMM, Kingston ValueRAM DDR4-3200. Compatible SSD: Samsung 990 EVO, WD Blue SN580, Crucial P3 Plus, Samsung 870 EVO 2.5″ SATA.
Power & Cooling
45W USB-C PD; passive or minimal fan. Silent operation ideal for quiet offices.
Connectivity
4× USB-A + USB-C + HDMI 2.0. Good for office peripherals; no Thunderbolt.
Upgradeability Score
| Category | Score |
|---|---|
| RAM Upgrade | 9/10 |
| SSD Upgrade | 9/10 |
| Ports & Connectivity | 7/10 |
| Display Support | 5/10 |
| Overall Upgradeability | 8/10 |
Frequently Asked Questions
ProDesk 405 G8 vs 400 G9?
405 G8: AMD, older, cheaper, 45W power. 400 G9: Intel, newer, faster. Choose 405 G8 for budget; 400 G9 for performance.
Can I upgrade to 64GB?
Yes. 2× 32GB DDR4 SO-DIMM (£100–150).
Is 45W power limiting?
No. Adequate for office work. Light development fine; heavy compilation slower.
How long supported?
Ryzen Pro support through 2026–2027. Shorter than Intel 12th/13th-gen.
Good for personal use?
Yes, good value for home office. Professional features (Pro branding) overkill for consumers.
Recommended Products
These are the products we recommend based on this guide. All links go to Amazon UK where you can check current prices and availability.
| Product | Why We Recommend It | Amazon UK |
|---|---|---|
| Corsair Vengeance DDR4 SO-DIMM 32GB (2×16GB) 3200MHz | Best overall DDR4 upgrade kit | View on Amazon UK |
| Kingston Fury Impact DDR4 SO-DIMM 32GB (2×16GB) 3200MHz | Reliable alternative with tight latency | View on Amazon UK |
| Crucial DDR4 SO-DIMM 16GB 3200MHz | Budget single-stick upgrade | View on Amazon UK |
| Samsung DDR4 SO-DIMM 32GB 3200MHz | OEM-quality for business laptops | View on Amazon UK |
| Samsung 990 Pro 2TB NVMe M.2 2280 | Fastest consumer NVMe — ideal for gaming & editing | View on Amazon UK |
| WD Black SN850X 2TB NVMe | Excellent Gen4 speed with heatsink option | View on Amazon UK |
| Crucial P5 Plus 1TB NVMe | Great value Gen4 SSD | View on Amazon UK |
| Kingston NV2 1TB NVMe | Budget-friendly with solid reliability | View on Amazon UK |
Prices and availability may vary. As an Amazon Associate, we earn from qualifying purchases.
Related HP Upgrade Guides
- HP Battery Replacement: EliteBook, Pavilion & OMEN Step-by-Step
- Best RAM for HP Laptops in 2026
- HP ProLiant DL365 Gen11 RAM & SSD Upgrade Guide (2023)
- HP ProLiant ML30 Gen11 RAM & SSD Upgrade Guide (2023)
- HP ProLiant DL385 Gen10 Plus RAM & SSD Upgrade Guide (2020)
- HP Upgrade Guide
Not sure what fits? Use our free Compatibility Checker covering 3,195+ models.
Helpful Guides
Recommended SATA SSDs
Western Digital
Western Digital Red WD ™ SA500 SATA SSD M.2 2280 POWERED BY SANDISK 1
£304.75
View Deal
Kingston Technology
Kingston Technology 1920G DC600M (Mixed-Use) 2.5” Enterprise SATA SSD
£976.75
View Deal
Western Digital
Western Digital Blue WD ™ SA510 SATA SSD M.2 2280 POWERED BY SANDISK 5
£145.70
View Deal
