AMD Ryzen 9 5900X vs Intel Core i5-8400
54.4Single-core31.1
62.1Multi-core28.6
79.6Gaming27.2
18 spec wins — AMD Ryzen 9 5900X2 spec wins — Intel Core i5-8400
InnoReviews verdict
AMD Ryzen 9 5900X wins this desktop processor face-off, 64.1 to 29, pulling ahead mainly in gaming (+52) and Multi-core (+34). Intel Core i5-8400 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 5900X
- Stronger Single-core score: 54 vs 31
- Stronger Multi-core score: 62 vs 29
- Stronger gaming score: 80 vs 27
- 611% higher L3 cache: 64 MB vs 9 MB
- 324% higher PassMark: 39,000 vs 9,200
Reasons to pick the Intel Core i5-8400
- 38% lower Base TDP: 65 W vs 105 W
- Has Cooler included — the other doesn't
- Lower launch price: $182 vs $549
General
| Spec | AMD Ryzen 9 5900X | Intel Core i5-8400 |
|---|---|---|
| Announced | 2020 | 2017 |
| Socket | AM4 | LGA1151-v2 |
| Process | 7 nm+50% | 14 nm |
| Base TDP | 105 W | 65 W+38% |
| Max turbo power | 142 W | — |
| Unlocked multiplier | Yes | No |
| Cooler included | No | Yes |
Cores & Clocks
| Spec | AMD Ryzen 9 5900X | Intel Core i5-8400 |
|---|---|---|
| Cores | 12+100% | 6 |
| Performance cores | 12+100% | 6 |
| Efficiency cores | 0 | 0 |
| Threads | 24+300% | 6 |
| Base clock | 3.7 GHz+32% | 2.8 GHz |
| Boost clock | 4.8 GHz+20% | 4 GHz |
| L2 cache | 6 MB+300% | 2 MB |
| L3 cache | 64 MB+611% | 9 MB |
Integrated GPU
| Spec | AMD Ryzen 9 5900X | Intel Core i5-8400 |
|---|---|---|
| iGPU | — | Intel UHD Graphics 630 |
| iGPU clock | — | 1,050 MHz |
Memory
| Spec | AMD Ryzen 9 5900X | Intel Core i5-8400 |
|---|---|---|
| Memory support | DDR4-3200 | DDR4-2666 |
| Max memory | 128 GB+100% | 64 GB |
| Memory channels | 2 | 2 |
Platform
| Spec | AMD Ryzen 9 5900X | Intel Core i5-8400 |
|---|---|---|
| PCIe version | 4+33% | 3 |
| CPU PCIe lanes | 24+50% | 16 |
Benchmarks
| Spec | AMD Ryzen 9 5900X | Intel Core i5-8400 |
|---|---|---|
| Geekbench 6 (single) | 2,100+53%Top 32% | 1,370Top 75% |
| Geekbench 6 (multi) | 13,500+176%Top 24% | 4,900Top 78% |
| Cinebench R23 (single) | 1,600+39%Top 39% | 1,150Top 75% |
| Cinebench R23 (multi) | 21,700+239%Top 20% | 6,400Top 77% |
| PassMark | 39,000+324%Top 16% | 9,200Top 80% |
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