Ryzen 9 3900X
12 cores / 24 threads, AM4, 105W, Zen 2
Used listings on eBay UK
3-month move: −9.8% (£113.82 to £102.67)
Price history
Week of 19 Oct£93.49median of 2 salesSold £93 to £94
- Target Price £105
- Week with 3+ sales
- Fewer sales
- Single sale
Show as a table
| Week of | Median | Sales |
|---|---|---|
| 20 Jul 2026 | £112.12 | 2 |
| 27 Jul 2026 | £98.87 | 7 |
| 3 Aug 2026 | £99.50 | 9 |
| 10 Aug 2026 | £113.88 | 7 |
| 17 Aug 2026 | £104.70 | 10 |
| 24 Aug 2026 | £123.91 | 7 |
| 31 Aug 2026 | £120.00 | 10 |
| 7 Sept 2026 | £124.99 | 5 |
| 14 Sept 2026 | £101.94 | 8 |
| 21 Sept 2026 | £99.99 | 5 |
| 28 Sept 2026 | £106.02 | 9 |
| 5 Oct 2026 | £106.38 | 8 |
| 12 Oct 2026 | £102.46 | 11 |
| 19 Oct 2026 | £93.49 | 2 |
What the sales show
About 7 sales a week in the four weeks to 21 Oct.
Before you buy or sell a used Ryzen 9 3900X
Packing 12 cores and 24 threads across two Zen 2 chiplets, the Ryzen 9 3900X boosts to 4.6 GHz at a 105W TDP. Distinguish it from the 3900XT, which shipped without a cooler, and the OEM-only 65W Ryzen 9 3900.
Retail boxes included a Wraith Prism RGB cooler, though sustained 12-core loads put real load on both the heatsink and motherboard VRMs. A dedicated graphics card is required, and 300-series or 400-series AM4 boards need a Zen 2 BIOS.
Recent UK sales
- 21 OctAMD Ryzen 9 3900X Processor (3.8GHz, 12 Cores, Socket AM4)21 Oct£93.99
- 19 OctAMD Ryzen 9 3900X 12-Core 3.8GHz CPU Processor Socket AM419 Oct£92.99
- 18 OctAMD Ryzen 9 3900X Ryzen 9 Processor CPU18 Oct£103.11
- 18 OctAMD Ryzen 9 CPU Processor AMD Ryzen 9 3900X Desktop Processor18 Oct£103.37
- 18 OctAMD Ryzen 9 3900X 12-Core 3.8GHz CPU Processor Socket AM418 Oct£114.00
- 18 OctAMD Ryzen 9 3900X 12-Core 3.8GHz AM4 CPU18 Oct£92.48
- 17 OctAMD Ryzen 9 3900X 12-Core 3.8GHz Socket AM4 CPU 100-00000002317 Oct£102.88
- 16 OctAMD Ryzen 9 3900X 3.8GHz AM4 12-Core CPU16 Oct£89.27
- 16 OctAMD Ryzen 9 3900X 12-Core 3.8GHz Socket AM4 CPU 6MB L2 64MB L316 Oct£97.43
- 15 OctAMD Ryzen 9 3900X CPU15 Oct£97.43
- 13 OctAMD Ryzen 9 CPU Processor AMD Ryzen 9 3900X Desktop Processor13 Oct£103.37
- 12 OctAMD Ryzen 9 3900X 12-Core Processor (3.8GHz / up to 4.6GHz / AM4) 100-00000002312 Oct£102.46
- 11 OctAMD Ryzen 9 3900X 12-Core 3.8GHz CPU Processor Socket AM411 Oct£117.18
- 11 OctAMD Ryzen 9 3900X 12-Core 3.8GHz Socket AM4 CPU w/ Wraith Prism Cooler11 Oct£108.07
- 10 OctAMD Ryzen 9 3900X Processor (12‑Core, Zen 2, AM4)10 Oct£113.49
