AMD Ryzen 9 3900X vs Intel Core i7-5820K
37.6Single-core20.7
54.2Multi-core30.2
78.3Gaming37.1
18 spec wins — AMD Ryzen 9 3900X2 spec wins — Intel Core i7-5820K
InnoReviews verdict
AMD Ryzen 9 3900X wins this desktop processor face-off, 55.3 to 29.1, pulling ahead mainly in gaming (+41) and Multi-core (+24). Intel Core i7-5820K still makes sense if its price or standout specs fit your needs better.
Which would you pick?
Key differences
Reasons to pick the AMD Ryzen 9 3900X
- Stronger Single-core score: 38 vs 21
- Stronger Multi-core score: 54 vs 30
- Stronger gaming score: 78 vs 37
- 327% higher L3 cache: 64 MB vs 15 MB
- 300% higher L2 cache: 6 MB vs 2 MB
Reasons to pick the Intel Core i7-5820K
- 100% higher Memory channels: 4 vs 2
- 17% higher CPU PCIe lanes: 28 vs 24
- Lower launch price: $389 vs $499
General
| Spec | AMD Ryzen 9 3900X | Intel Core i7-5820K |
|---|---|---|
| Announced | 2019 | 2014 |
| Socket | AM4 | LGA2011-v3 |
| Process | 7 nm+68% | 22 nm |
| Base TDP | 105 W+25% | 140 W |
| Max turbo power | 142 W | — |
| Unlocked multiplier | Yes | Yes |
| Cooler included | Yes | No |
Cores & Clocks
| Spec | AMD Ryzen 9 3900X | Intel Core i7-5820K |
|---|---|---|
| Cores | 12+100% | 6 |
| Performance cores | 12+100% | 6 |
| Efficiency cores | 0 | 0 |
| Threads | 24+100% | 12 |
| Base clock | 3.8 GHz+15% | 3.3 GHz |
| Boost clock | 4.6 GHz+28% | 3.6 GHz |
| L2 cache | 6 MB+300% | 2 MB |
| L3 cache | 64 MB+327% | 15 MB |
Memory
| Spec | AMD Ryzen 9 3900X | Intel Core i7-5820K |
|---|---|---|
| Memory support | DDR4-3200 | DDR4-2133 |
| Max memory | 128 GB+100% | 64 GB |
| Memory channels | 2 | 4+100% |
Platform
| Spec | AMD Ryzen 9 3900X | Intel Core i7-5820K |
|---|---|---|
| PCIe version | 4+33% | 3 |
| CPU PCIe lanes | 24 | 28+17% |
Benchmarks
| Spec | AMD Ryzen 9 3900X | Intel Core i7-5820K |
|---|---|---|
| Geekbench 6 (single) | 1,540+48%Top 63% | 1,040Top 95% |
| Geekbench 6 (multi) | 11,000+116%Top 35% | 5,100Top 73% |
| Cinebench R23 (single) | 1,300+46%Top 59% | 890Top 96% |
| Cinebench R23 (multi) | 18,300+186%Top 24% | 6,400Top 77% |
| PassMark | 32,600+157%Top 26% | 12,700Top 72% |
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