AMD Ryzen 9 7900X3D vs Intel Core i5-8400
77.8Single-core31.1
75.2Multi-core28.6
94.4Gamingspec-based27.2
17 spec wins — AMD Ryzen 9 7900X3D2 spec wins — Intel Core i5-8400
InnoReviews verdict
AMD Ryzen 9 7900X3D wins this desktop processor face-off, 80.8 to 29, pulling ahead mainly in single-core (+47) and multi-core (+47). 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 7900X3D
- Stronger single-core score: 78 vs 31
- Stronger multi-core score: 75 vs 29
- 1322% higher L3 cache: 128 MB vs 9 MB
- 700% higher L2 cache: 12 MB vs 2 MB
- 446% higher PassMark: 50,200 vs 9,200
Reasons to pick the Intel Core i5-8400
- 46% lower Base TDP: 65 W vs 120 W
- Has Cooler included — the other doesn't
- Lower launch price: $182 vs $599
General
| Spec | AMD Ryzen 9 7900X3D | Intel Core i5-8400 |
|---|---|---|
| Announced | 2023 | 2017 |
| Socket | AM5 | LGA1151-v2 |
| Process | 5 nm+64% | 14 nm |
| Base TDP | 120 W | 65 W+46% |
| Max turbo power | 162 W | — |
| Unlocked multiplier | No | No |
| Cooler included | No | Yes |
Cores & Clocks
| Spec | AMD Ryzen 9 7900X3D | Intel Core i5-8400 |
|---|---|---|
| Cores | 12+100% | 6 |
| Performance cores | 12+100% | 6 |
| Efficiency cores | 0 | 0 |
| Threads | 24+300% | 6 |
| Base clock | 4.4 GHz+57% | 2.8 GHz |
| Boost clock | 5.6 GHz+40% | 4 GHz |
| L2 cache | 12 MB+700% | 2 MB |
| L3 cache | 128 MB+1322% | 9 MB |
Integrated GPU
| Spec | AMD Ryzen 9 7900X3D | Intel Core i5-8400 |
|---|---|---|
| iGPU | AMD Radeon Graphics | Intel UHD Graphics 630 |
| iGPU clock | 2,200 MHz | 1,050 MHz |
Memory
| Spec | AMD Ryzen 9 7900X3D | Intel Core i5-8400 |
|---|---|---|
| Memory support | DDR5-5200 | DDR4-2666 |
| Max memory | 128 GB+100% | 64 GB |
| Memory channels | 2 | 2 |
Platform
| Spec | AMD Ryzen 9 7900X3D | Intel Core i5-8400 |
|---|---|---|
| PCIe version | 5+67% | 3 |
| CPU PCIe lanes | 28+75% | 16 |
Benchmarks
| Spec | AMD Ryzen 9 7900X3D | Intel Core i5-8400 |
|---|---|---|
| Geekbench 6 (single) | 3,020+120%Top 17% | 1,370Bottom 22% |
| Geekbench 6 (multi) | 18,128+270%Top 20% | 4,900Bottom 20% |
| Cinebench R23 (single) | 1,908+66%Top 29% | 1,150Bottom 23% |
| Cinebench R23 (multi) | 26,747+318%Top 19% | 6,400Bottom 19% |
| PassMark | 50,200+446%Top 17% | 9,200Bottom 14% |
Related comparisons
AMD Ryzen 9 7900X3Dvs Intel Core i7-14700KVSAMD Ryzen 9 7900X3Dvs AMD Ryzen 9 7900XVSAMD Ryzen 9 7900X3Dvs Intel Core Ultra 5 250K PlusVSAMD Ryzen 9 7900X3Dvs Intel Core Ultra 9 285VSIntel Core i5-8400vs Intel Core i7-5820KVSIntel Core i5-8400vs Intel Core i3-10100FVSIntel Core i5-8400vs Intel Core i5-9400FVSIntel Core i5-8400vs Intel Core i7-5930KVS