AMD Ryzen 7 7840U vs AMD Ryzen 9 9955HX
60.8Single-core74.2
47.5Multi-core82
73.5Efficiencyspec-based42.2
68.5iGPU32.6
61.8Platformspec-based84.3
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, 69.5 to 59, pulling ahead mainly in multi-core (+35) and single-core (+13). 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 iGPU score: 69 vs 33
- 404% higher 3DMark Time Spy Graphics (iGPU): 2,659 vs 528
- 49% lower Base TDP: 28 W vs 55 W
- 32% higher Base clock: 3.3 GHz vs 2.5 GHz
Reasons to pick the AMD Ryzen 9 9955HX
- Stronger single-core score: 74 vs 61
- Stronger multi-core score: 82 vs 48
- 300% higher L3 cache: 64 MB vs 16 MB
- 159% higher Cinebench R23 (multi): 37,500 vs 14,500
- 150% higher Max TDP: 75 W vs 30 W
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 | 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) | 2,580Top 46% | 3,080+19%Top 14% |
| Geekbench 6 (multi) | 11,700Top 49% | 19,500+67%Top 10% |
| Cinebench R23 (single) | 1,740Top 50% | 2,150+24%Top 11% |
| Cinebench R23 (multi) | 14,500Top 40% | 37,500+159%Top 2% |
| PassMark | 24,388Top 39% | 56,261+131%Top 4% |
| 3DMark Time Spy Graphics (iGPU) | 2,659+404%Top 23% | 528Bottom 18% |
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