AMD Ryzen 7 H 255 vs AMD Ryzen 9 7940HX
59.8Single-core64
51Multi-core71.4
53.8Efficiencyspec-based40
71.7iGPU—
61.8Platformspec-based75.4
5 spec wins — AMD Ryzen 7 H 25511 spec wins — AMD Ryzen 9 7940HX
InnoReviews verdict
AMD Ryzen 9 7940HX wins this laptop processor face-off, 64.8 to 57.3, pulling ahead mainly in multi-core (+20) and single-core (+4). AMD Ryzen 7 H 255 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 H 255
- 300% higher Max memory: 256 GB vs 64 GB
- 58% higher Base clock: 3.8 GHz vs 2.4 GHz
- 20% lower process: 4 nm vs 5 nm
- 18% lower Base TDP: 45 W vs 55 W
Reasons to pick the AMD Ryzen 9 7940HX
- Stronger single-core score: 64 vs 60
- Stronger multi-core score: 71 vs 51
- 300% higher L3 cache: 64 MB vs 16 MB
- 100% higher cores: 16 vs 8
- 100% higher Performance cores: 16 vs 8
General
| Spec | AMD Ryzen 7 H 255 | AMD Ryzen 9 7940HX |
|---|---|---|
| Announced | 2025 | 2024 |
| Process | 4 nm+20% | 5 nm |
| Base TDP | 45 W+18% | 55 W |
| Max TDP | 54 W | 75 W+39% |
Cores & Clocks
| Spec | AMD Ryzen 7 H 255 | AMD Ryzen 9 7940HX |
|---|---|---|
| Cores | 8 | 16+100% |
| Performance cores | 8 | 16+100% |
| Efficiency cores | 0 | 0 |
| Threads | 16 | 32+100% |
| Base clock | 3.8 GHz+58% | 2.4 GHz |
| Boost clock | 4.9 GHz | 5.2 GHz+6% |
| L3 cache | 16 MB | 64 MB+300% |
Integrated GPU
| Spec | AMD Ryzen 7 H 255 | AMD Ryzen 9 7940HX |
|---|---|---|
| iGPU | AMD Radeon 780M | AMD Radeon 610M |
| iGPU clock | 2,600 MHz | 2,200 MHz |
Memory
| Spec | AMD Ryzen 7 H 255 | AMD Ryzen 9 7940HX |
|---|---|---|
| Memory support | LPDDR5X-7500 / DDR5-5600 | DDR5-5200 |
| Max memory | 256 GB+300% | 64 GB |
Benchmarks
| Spec | AMD Ryzen 7 H 255 | AMD Ryzen 9 7940HX |
|---|---|---|
| Geekbench 6 (single) | 2,546Bottom 51% | 2,751+8%Top 33% |
| Geekbench 6 (multi) | 12,670Top 39% | 16,094+27%Top 19% |
| Cinebench R23 (single) | 1,708Bottom 47% | 1,807+6%Top 39% |
| Cinebench R23 (multi) | 16,137Top 34% | 29,400+82%Top 8% |
| PassMark | 28,205Top 27% | 52,889+88%Top 7% |
| 3DMark Time Spy Graphics (iGPU) | 3,077Top 17% | — |
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