AMD Ryzen 5 8645HS vs AMD Ryzen 9 9955HX
59.3Single-core74.2
44.1Multi-core82
65.4Efficiencyspec-based42.2
64.9iGPU32.6
58.8Platformspec-based84.3
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, 69.5 to 55.4, pulling ahead mainly in multi-core (+38) and single-core (+15). 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 iGPU score: 65 vs 33
- 328% higher 3DMark Time Spy Graphics (iGPU): 2,260 vs 528
- 72% higher Base clock: 4.3 GHz vs 2.5 GHz
- 36% lower Base TDP: 35 W vs 55 W
Reasons to pick the AMD Ryzen 9 9955HX
- Stronger single-core score: 74 vs 59
- Stronger multi-core score: 82 vs 44
- 300% higher L3 cache: 64 MB vs 16 MB
- 188% higher Cinebench R23 (multi): 37,500 vs 13,000
- 167% higher cores: 16 vs 6
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 | 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) | 2,520Bottom 49% | 3,080+22%Top 14% |
| Geekbench 6 (multi) | 10,300Bottom 41% | 19,500+89%Top 10% |
| Cinebench R23 (single) | 1,700Bottom 45% | 2,150+26%Top 11% |
| Cinebench R23 (multi) | 13,000Top 49% | 37,500+188%Top 2% |
| PassMark | 21,977Top 47% | 56,261+156%Top 4% |
| 3DMark Time Spy Graphics (iGPU) | 2,260+328%Top 33% | 528Bottom 18% |
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