AMD Ryzen 7 7840U vs AMD Ryzen 9 7940HX
60.8Single-core64
47.5Multi-core71.4
73.5Efficiencyspec-based40
68.5iGPU—
61.8Platformspec-based75.4
4 spec wins — AMD Ryzen 7 7840U12 spec wins — AMD Ryzen 9 7940HX
InnoReviews verdict
AMD Ryzen 9 7940HX wins this laptop processor face-off, 64.8 to 59, pulling ahead mainly in multi-core (+24) and single-core (+3). 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
- 300% higher Max memory: 256 GB vs 64 GB
- 49% lower Base TDP: 28 W vs 55 W
- 38% higher Base clock: 3.3 GHz vs 2.4 GHz
- 20% lower process: 4 nm vs 5 nm
Reasons to pick the AMD Ryzen 9 7940HX
- Stronger single-core score: 64 vs 61
- Stronger multi-core score: 71 vs 48
- 300% higher L3 cache: 64 MB vs 16 MB
- 150% higher Max TDP: 75 W vs 30 W
- 117% higher PassMark: 52,889 vs 24,388
General
| Spec | AMD Ryzen 7 7840U | AMD Ryzen 9 7940HX |
|---|---|---|
| Announced | 2023 | 2024 |
| Process | 4 nm+20% | 5 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 7940HX |
|---|---|---|
| Cores | 8 | 16+100% |
| Performance cores | 8 | 16+100% |
| Efficiency cores | — | 0 |
| Threads | 16 | 32+100% |
| Base clock | 3.3 GHz+38% | 2.4 GHz |
| Boost clock | 5.1 GHz | 5.2 GHz+2% |
| L3 cache | 16 MB | 64 MB+300% |
Integrated GPU
| Spec | AMD Ryzen 7 7840U | AMD Ryzen 9 7940HX |
|---|---|---|
| iGPU | AMD Radeon 780M | AMD Radeon 610M |
| iGPU clock | 2,700 MHz | 2,200 MHz |
Memory
| Spec | AMD Ryzen 7 7840U | AMD Ryzen 9 7940HX |
|---|---|---|
| Memory support | LPDDR5X-7500 / DDR5-5600 | DDR5-5200 |
| Max memory | 256 GB+300% | 64 GB |
Benchmarks
| Spec | AMD Ryzen 7 7840U | AMD Ryzen 9 7940HX |
|---|---|---|
| Geekbench 6 (single) | 2,580Top 46% | 2,751+7%Top 33% |
| Geekbench 6 (multi) | 11,700Top 49% | 16,094+38%Top 19% |
| Cinebench R23 (single) | 1,740Top 50% | 1,807+4%Top 39% |
| Cinebench R23 (multi) | 14,500Top 40% | 29,400+103%Top 8% |
| PassMark | 24,388Top 39% | 52,889+117%Top 7% |
| 3DMark Time Spy Graphics (iGPU) | 2,659Top 23% | — |
Related comparisons
AMD Ryzen 7 7840Uvs Qualcomm Snapdragon X Elite X1E-84-100VSAMD Ryzen 7 7840Uvs Apple M2 Max (12-core)VSAMD Ryzen 7 7840Uvs AMD Ryzen 7 7840HSVSAMD Ryzen 7 7840Uvs AMD Ryzen 7 8845HSVSAMD Ryzen 9 7940HXvs AMD Ryzen 9 7945HXVSAMD Ryzen 9 7940HXvs Apple M4 (10-core)VSAMD Ryzen 9 7940HXvs Intel Core Ultra 7 255HVSAMD Ryzen 9 7940HXvs AMD Ryzen AI 9 365VS