Quick Specs Summary
| Specification | Detail |
|---|---|
| Display Outputs | HDMI 2.0, USB-C DP 1.2 |
| CPU | Intel 9th/10th Gen i7 / i9 (Coffee Lake / Comet Lake) |
| RAM Type | DDR4-2666 / DDR4-2933 SO-DIMM |
| RAM Slots | 2 slots |
| Max RAM | 64GB (32GB per slot) |
| SSD Type | M.2 2280 NVMe (PCIe 3.0) |
| SSD Slots | 2 slots |
| GPU Slot | Full-length PCIe x16 (discrete GPU) |
| Power Supply | 500W internal PSU |
| Thunderbolt | Thunderbolt 3 (2 ports) |
| WiFi | WiFi 5 / WiFi 6 |
| Upgradeability | ★★★★★ |
Can You Upgrade the Intel NUC 9 Extreme?
The NUC 9 Extreme (Ghost Canyon) is a compact desktop replacement from 2019-2020. All components are upgradeable: DDR4 RAM up to 64GB, dual M.2 NVMe slots, full-length PCIe x16 GPU slot, and 500W internal PSU. This is a fully customizable gaming/workstation system. Finding one used in 2026 at discount makes it excellent value. Verdict: Fully modular legacy powerhouse—excellent used buy.
RAM Compatibility
Two DDR4 SO-DIMM slots support up to 64GB total. Speed depends on CPU variant: 9th Gen supports DDR4-2666, 10th Gen DDR4-2933. Either way, DDR4 is affordable and abundant. Upgrading is simple.
Compatible RAM Modules
| Module | Capacity | Speed | Price (approx.) |
|---|---|---|---|
| Crucial CT DDR4 SO-DIMM | 32GB | DDR4-2933 | £40–65 |
| Kingston ValueRAM | 32GB | DDR4-2933 | £45–70 |
| Corsair Vengeance LPX | 32GB | DDR4-2933 | £60–85 |
| G.Skill Ripjaws SO-DIMM | 32GB | DDR4-2933 | £55–80 |
Browse DDR4 SO-DIMM on Amazon UK
SSD Compatibility
Two M.2 2280 NVMe slots use PCIe 3.0. Both slots are easily accessible and support RAID 0/1. PCIe 3.0 achieves ~3,500 MB/s, adequate for gaming and content creation. Upgrading to larger capacity drives is straightforward.
Compatible SSDs
| Drive | Capacity | Interface | Price (approx.) |
|---|---|---|---|
| Samsung 970 EVO | 1TB / 2TB | PCIe 3.0 | £25–110 |
| WD Blue SN550 | 1TB / 2TB | PCIe 3.0 | £20–100 |
| Crucial P1 | 1TB / 2TB | PCIe 3.0 | £15–95 |
| Kingston A2000 | 1TB / 2TB | PCIe 3.0 | £20–105 |
GPU Support
Full-length PCIe x16 slot accepts any discrete graphics card. The 500W PSU handles RTX 2080 Ti, RTX 2070, GTX 1080, and older high-end GPUs. Popular used configurations include RTX 2070 Super or RTX 2080. GPU upgrades are straightforward: remove side panel, unscrew GPU holder, insert new card.
Popular Used GPU Options (2026)
| GPU | TDP | VRAM | Used Price (approx.) |
|---|---|---|---|
| RTX 2080 | 250W | 8GB GDDR6 | £200–300 |
| RTX 2070 Super | 215W | 8GB GDDR6 | £150–250 |
| RTX 2060 Super | 175W | 8GB GDDR6 | £100–150 |
| GTX 1080 Ti | 250W | 11GB GDDR5X | £220–320 |
Browse graphics cards on Amazon UK
Power Supply
Integrated 500W PSU is adequate for most single-GPU builds. RTX 2070 Super + i7-10700 = ~450W under load, leaving ~50W headroom. RTX 2080 Ti pushes the limit—not recommended. The PSU is passive/semi-passive cooled; ensure case ventilation.
Display Outputs & Docking
HDMI 2.0 (4K@30Hz) and USB-C DP 1.2. Thunderbolt 3 (not TB4) supports external displays and docking. GPU HDMI outputs provide additional display connections.
WiFi & Bluetooth
WiFi 5 or WiFi 6 depending on variant (not 6E). For modern performance, WiFi 6 is preferable. The module may be user-replaceable depending on design—check your specific unit.
Upgradeability Score
- RAM: ★★★★★ (2 DDR4 SO-DIMM slots, 64GB max)
- SSD: ★★★★★ (Dual M.2, 4TB total)
- GPU: ★★★★★ (Full PCIe x16 support)
- Overall: ★★★★★
Frequently Asked Questions
Should I buy a used NUC 9 Extreme in 2026?
Yes, if the price is right (£250–400 used). Performance competes with new budget NUCs at half the cost. The 10th Gen i7/i9 variants are particularly good value. Check thermals and PSU condition before purchase.
Can I upgrade the CPU?
No. The CPU is soldered. You’re locked into 9th or 10th Gen depending on which variant you buy. This is the main limitation vs. newer NUCs.
Does the 500W PSU handle RTX 3060?
RTX 3060 needs 170W, so theoretically yes. However, the PSU is over 5 years old and may degrade. Recommended ceiling is RTX 2070 / RTX 2080 for reliability.
Is Thunderbolt 3 still useful in 2026?
Yes. TB3 (40 Gbps) is still fast for external storage and docks. TB4 is newer, but TB3 devices work fine. Not a dealbreaker.
What’s the thermal performance of NUC 9 Extreme?
Under RTX 2070 + i7 load, expect 70-80°C on CPU, 80-85°C on GPU. The chassis thermals are tight—ensure fans run freely. Repasting the CPU can help if thermals are excessive.
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 |
| Corsair Vengeance DDR5 SO-DIMM 32GB (2×16GB) 5600MHz | Top-rated DDR5 kit for gaming & productivity | View on Amazon UK |
| Kingston Fury Impact DDR5 SO-DIMM 32GB (2×16GB) 5600MHz | Excellent DDR5 alternative with XMP support | 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 Intel Upgrade Guides
- Intel NUC 13 Pro Compatibility
- Intel NUC Mini PC Upgrade Guide
- Mini PC vs NUC
- Intel NUC 11 Enthusiast
- Intel NUC 11 Pro
- Intel Upgrade Guide
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Prices from PCHub.UK via ComputersDeal. As an affiliate, we may earn from qualifying purchases. Prices updated 2026-04-10 13:15:58.
