AMD Ryzen 5 8645HS vs AMD Ryzen 9 9955HX
46.2Single-core70.9
31.5Multi-core81.4
65.4Efficiency42.2
88iGPU72
58.8Platform84.3
3 spec wins — AMD Ryzen 5 8645HS12 spec wins — AMD Ryzen 9 9955HX
InnoReviews verdict
AMD Ryzen 9 9955HX wins this laptop processor face-off, 72.4 to 50, pulling ahead mainly in Multi-core (+50) and platform (+26). AMD Ryzen 5 8645HS 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 5 8645HS
- Stronger efficiency score: 65 vs 42
- Stronger iGPU score: 88 vs 72
- 72% higher Base clock: 4.3 GHz vs 2.5 GHz
- 36% lower Base TDP: 35 W vs 55 W
- 18% higher iGPU clock: 2,600 MHz vs 2,200 MHz
Reasons to pick the AMD Ryzen 9 9955HX
- Stronger Single-core score: 71 vs 46
- Stronger Multi-core score: 81 vs 32
- Stronger platform score: 84 vs 59
- 300% higher L3 cache: 64 MB vs 16 MB
- 188% higher Cinebench R23 (multi): 37,500 vs 13,000
General
| Spec | AMD Ryzen 5 8645HS | AMD Ryzen 9 9955HX |
|---|---|---|
| Announced | 2023 | 2025 |
| Process | 4 nm | 4 nm |
| Base TDP | 35 W+36% | 55 W |
| Max TDP | 54 W | 75 W+39% |
Cores & Clocks
| Spec | AMD Ryzen 5 8645HS | AMD Ryzen 9 9955HX |
|---|---|---|
| Cores | 6 | 16+167% |
| Performance cores | 6 | 16+167% |
| Threads | 12 | 32+167% |
| Base clock | 4.3 GHz+72% | 2.5 GHz |
| Boost clock | 5 GHz | 5.4 GHz+8% |
| L3 cache | 16 MB | 64 MB+300% |
Integrated GPU
| Spec | AMD Ryzen 5 8645HS | AMD Ryzen 9 9955HX |
|---|---|---|
| iGPU | AMD Radeon 760M | AMD Radeon 610M |
| iGPU clock | 2,600 MHz+18% | 2,200 MHz |
Memory
| Spec | AMD Ryzen 5 8645HS | AMD Ryzen 9 9955HX |
|---|---|---|
| Memory support | LPDDR5X-7500 / DDR5-5600 | DDR5-5600 |
| Max memory | 256 GB | 256 GB |
Benchmarks
| Spec | AMD Ryzen 5 8645HS | AMD Ryzen 9 9955HX |
|---|---|---|
| Geekbench 6 (single) | 2,520 | 3,080+22% |
| Geekbench 6 (multi) | 10,300 | 19,500+89% |
| Cinebench R23 (single) | 1,700 | 2,150+26% |
| Cinebench R23 (multi) | 13,000 | 37,500+188% |
| PassMark | 24,300 | 62,000+155% |
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