AMD Ryzen 7 7840U vs AMD Ryzen 9 9955HX
48.6Single-core70.9
36.7Multi-core81.4
73.5Efficiency42.2
92iGPU72
61.8Platform84.3
3 spec wins — AMD Ryzen 7 7840U12 spec wins — AMD Ryzen 9 9955HX
InnoReviews verdict
AMD Ryzen 9 9955HX wins this laptop processor face-off, 72.4 to 54.5, pulling ahead mainly in Multi-core (+45) and platform (+23). AMD Ryzen 7 7840U 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 7 7840U
- Stronger efficiency score: 74 vs 42
- Stronger iGPU score: 92 vs 72
- 49% lower Base TDP: 28 W vs 55 W
- 32% higher Base clock: 3.3 GHz vs 2.5 GHz
- 23% higher iGPU clock: 2,700 MHz vs 2,200 MHz
Reasons to pick the AMD Ryzen 9 9955HX
- Stronger Single-core score: 71 vs 49
- Stronger Multi-core score: 81 vs 37
- Stronger platform score: 84 vs 62
- 300% higher L3 cache: 64 MB vs 16 MB
- 159% higher Cinebench R23 (multi): 37,500 vs 14,500
General
| Spec | AMD Ryzen 7 7840U | AMD Ryzen 9 9955HX |
|---|---|---|
| Announced | 2023 | 2025 |
| Process | 4 nm | 4 nm |
| Base TDP | 28 W+49% | 55 W |
| Max TDP | 30 W | 75 W+150% |
Cores & Clocks
| Spec | AMD Ryzen 7 7840U | AMD Ryzen 9 9955HX |
|---|---|---|
| Cores | 8 | 16+100% |
| Performance cores | 8 | 16+100% |
| Threads | 16 | 32+100% |
| Base clock | 3.3 GHz+32% | 2.5 GHz |
| Boost clock | 5.1 GHz | 5.4 GHz+6% |
| L3 cache | 16 MB | 64 MB+300% |
Integrated GPU
| Spec | AMD Ryzen 7 7840U | AMD Ryzen 9 9955HX |
|---|---|---|
| iGPU | AMD Radeon 780M | AMD Radeon 610M |
| iGPU clock | 2,700 MHz+23% | 2,200 MHz |
Memory
| Spec | AMD Ryzen 7 7840U | AMD Ryzen 9 9955HX |
|---|---|---|
| Memory support | LPDDR5X-7500 / DDR5-5600 | DDR5-5600 |
| Max memory | 256 GB | 256 GB |
Benchmarks
| Spec | AMD Ryzen 7 7840U | AMD Ryzen 9 9955HX |
|---|---|---|
| Geekbench 6 (single) | 2,580 | 3,080+19% |
| Geekbench 6 (multi) | 11,700 | 19,500+67% |
| Cinebench R23 (single) | 1,740 | 2,150+24% |
| Cinebench R23 (multi) | 14,500 | 37,500+159% |
| PassMark | 28,400 | 62,000+118% |
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