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Quick Specs Summary
| Specification | Detail |
|---|---|
| Display Outputs | HDMI 2.0, USB-C DP 1.2 |
| CPU | Intel 9th Gen Core i5 / i7 / i9 (Coffee Lake) |
| RAM Type | DDR4-2666 SO-DIMM |
| RAM Slots | 2 slots |
| Max RAM | 64GB (32GB per slot) |
| SSD Type | M.2 2280/22110 NVMe (PCIe 3.0; two slots also accept SATA) |
| SSD Slots | 3 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 | Excellent (5/5) |
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, three M.2 slots (up to 22110), 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. Intel specifies DDR4-2666; the DDR4-2933 modules below fit and work, but run at 2666. 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 |
SSD Compatibility
Three M.2 slots (up to 22110) support PCIe 3.0 NVMe, and two of them also accept SATA. The 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
Power Supply
Integrated 500W PSU is adequate for most single-GPU builds. Intel rates the internal PSU at 500W (485W maximum continuous output). 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: Excellent (5/5) (2 DDR4 SO-DIMM slots, 64GB max)
- SSD: Excellent (5/5) (Three M.2 slots)
- GPU: Excellent (5/5) (Full PCIe x16 support)
- Overall: Excellent (5/5)
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 i7 and 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 a 9th Gen Core i5, i7 or i9, 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 where you can check current prices and availability.
| Product | Why We Recommend It | Amazon |
|---|---|---|
| Corsair Vengeance DDR4 SO-DIMM 32GB (2×16GB) 3200MHz | Best overall DDR4 upgrade kit | View on Amazon |
| Kingston Fury Impact DDR4 SO-DIMM 32GB (2×16GB) 3200MHz | Reliable alternative with tight latency | View on Amazon |
| Corsair Vengeance DDR5 SO-DIMM 32GB (2×16GB) 5600MHz | Top-rated DDR5 kit for gaming & productivity | View on Amazon |
| Kingston Fury Impact DDR5 SO-DIMM 32GB (2×16GB) 5600MHz | Excellent DDR5 alternative with XMP support | View on Amazon |
| Samsung 990 Pro 2TB NVMe M.2 2280 | Fastest consumer NVMe — ideal for gaming & editing | View on Amazon |
| WD Black SN850X 2TB NVMe | Excellent Gen4 speed with heatsink option | View on Amazon |
| Crucial P5 Plus 1TB NVMe | Great value Gen4 SSD | View on Amazon |
| Kingston NV2 1TB NVMe | Budget-friendly with solid reliability | View on Amazon |
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
Not sure what fits? Use our free Compatibility Checker covering 3,195+ models.
Helpful Guides
Upgrades that fit the Intel NUC 9 Extreme
What fits: Memory: DDR4 SO-DIMM, 2 user slots, up to 64GB · Storage: M.2 22110 NVMe or SATA; M.2 2280 NVMe or SATA; M.2 22110 NVMe PCIe 3.0 · Charger: internal PSU 500W
Spec source: en.wikipedia.org (checked 26 Sep 2026).
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DDR4 SO-DIMM memory that fits
M.2 2280 NVMe SSDs that fit
*Indicative UK street prices, shown for guidance only. These are not live Amazon prices and change frequently — check the current price on Amazon before buying.
