AMD Ryzen 5 8400F vs AMD Ryzen 9 9900X
—Single-core90.1
46.4Multi-core83.6
45.5Gamingspec-based84.6
3 spec wins — AMD Ryzen 5 8400F11 spec wins — AMD Ryzen 9 9900X
InnoReviews verdict
No overall winner yet: AMD Ryzen 5 8400F lacks the published benchmark results an Inno Score requires, so there is no Inno Score to compare — we don't rank chips on their spec sheet alone. The spec table below still shows every difference we track.
Which would you pick?
Key differences
Reasons to pick the AMD Ryzen 5 8400F
- 46% lower Base TDP: 65 W vs 120 W
- 33% higher Max memory: 256 GB vs 192 GB
- Has Cooler included — the other doesn't
- Lower launch price: $170 vs $499
Reasons to pick the AMD Ryzen 9 9900X
- Stronger multi-core score: 84 vs 46
- 300% higher L3 cache: 64 MB vs 16 MB
- 128% higher PassMark: 55,500 vs 24,372
- 100% higher cores: 12 vs 6
- 100% higher Performance cores: 12 vs 6
General
| Spec | AMD Ryzen 5 8400F | AMD Ryzen 9 9900X |
|---|---|---|
| Announced | 2024 | 2024 |
| Socket | AM5 | AM5 |
| Process | 4 nm | 4 nm |
| Base TDP | 65 W+46% | 120 W |
| Max turbo power | 88 W | 162 W+84% |
| Unlocked multiplier | Yes | Yes |
| Cooler included | Yes | No |
Cores & Clocks
| Spec | AMD Ryzen 5 8400F | AMD Ryzen 9 9900X |
|---|---|---|
| Cores | 6 | 12+100% |
| Performance cores | 6 | 12+100% |
| Efficiency cores | 0 | 0 |
| Threads | 12 | 24+100% |
| Base clock | 4.2 GHz | 4.4 GHz+5% |
| Boost clock | 4.7 GHz | 5.6 GHz+19% |
| L2 cache | 6 MB | 12 MB+100% |
| L3 cache | 16 MB | 64 MB+300% |
Integrated GPU
| Spec | AMD Ryzen 5 8400F | AMD Ryzen 9 9900X |
|---|---|---|
| iGPU | — | AMD Radeon Graphics (2 CU RDNA 2) |
| iGPU clock | — | 2,200 MHz |
Memory
| Spec | AMD Ryzen 5 8400F | AMD Ryzen 9 9900X |
|---|---|---|
| Memory support | DDR5-5200 | DDR5-5600 |
| Max memory | 256 GB+33% | 192 GB |
| Memory channels | 2 | 2 |
Platform
| Spec | AMD Ryzen 5 8400F | AMD Ryzen 9 9900X |
|---|---|---|
| PCIe version | 4 | 5+25% |
| CPU PCIe lanes | 20 | 28+40% |
Benchmarks
| Spec | AMD Ryzen 5 8400F | AMD Ryzen 9 9900X |
|---|---|---|
| Geekbench 6 (single) | — | 3,300Top 6% |
| Geekbench 6 (multi) | — | 19,800Top 15% |
| Cinebench R23 (single) | — | 2,230Top 11% |
| Cinebench R23 (multi) | — | 32,000Top 14% |
| PassMark | 24,372Bottom 45% | 55,500+128%Top 13% |
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