AMD Ryzen 9 7940HS vs AMD Ryzen 7 7840HS: comparison
Comparison of AMD Ryzen 9 7940HS and AMD Ryzen 7 7840HS: key differences and a full specification table.
Key differences
AMD Ryzen 9 7940HS has a higher base clock (4 GHz vs 3.8 GHz), a higher maximum clock (5.2 GHz vs 5.1 GHz) and a higher maximum integrated graphics clock (2.8 GHz vs 2.7 GHz).
Both processors match on: core count (8), thread count (16), L3 cache (16 MB), TDP (35–54 W), process node (4 nm), maximum memory size (256 GB), memory channels (2), PCIe version (4).
These are specification values: they show differences between the models but do not determine a performance winner. For a specific workload, rely on independent benchmarks.
Key specifications
| Parameter | AMD Ryzen 9 7940HS | AMD Ryzen 7 7840HS |
|---|---|---|
| Cores / threads | 8 / 16 | 8 / 16 |
| Max boost clock | 5.2 GHz | 5.1 GHz |
| L3 cache | 16 MB | 16 MB |
| TDP | 35–54 W | 35–54 W |
| Process | 4 nm | 4 nm |
| Integrated graphics | AMD Radeon 780M | AMD Radeon 780M |
Full specification table
Differing values are highlighted. This is not a better/worse rating: numbers from different architectures are not always comparable.
| Parameter | AMD Ryzen 9 7940HS | AMD Ryzen 7 7840HS |
|---|---|---|
| General | ||
| Codename | Phoenix | Phoenix |
| Segment | Mobile | Mobile |
| Product line | AMD Ryzen 9 Processors with Radeon Graphics | AMD Ryzen 7 Processors with Radeon Graphics |
| Product family | AMD Ryzen Processors | AMD Ryzen Processors |
| Architecture | "Zen 4" | "Zen 4" |
| Process | 4 nm | 4 nm |
| Dies per package | 1 | 1 |
| Unlocked for overclocking | No | No |
| Operating system support | Windows 11 - 64-Bit Edition, Windows 10 - 64-Bit Edition, RHEL x86 64-Bit, Ubuntu x86 64-Bit | Windows 11 - 64-Bit Edition, Windows 10 - 64-Bit Edition, RHEL x86 64-Bit, Ubuntu x86 64-Bit |
| Regional availability | NA, EMEA, APJ, LATAM | NA, EMEA, APJ, LATAM |
| Consumer oriented | Yes | Yes |
| CPU | ||
| Cores | 8 | 8 |
| Threads | 16 | 16 |
| Multithreading (SMT/HT) | Yes | Yes |
| Base clock | 4 GHz | 3.8 GHz |
| Max boost clock | 5.2 GHz | 5.1 GHz |
| L1 cache | 512 KB | 512 KB |
| L2 cache | 8 MB | 8 MB |
| L3 cache | 16 MB | 16 MB |
| TDP | 35–54 W | 35–54 W |
| Configurable TDP | 35–54 W | 35–54 W |
| Instruction set | x86-64 | x86-64 |
| Instruction set extensions | AES, AMD-V, AVX, AVX2, AVX512, FMA3, MMX(+), SHA, SSE, SSE2, SSE3, SSE4.1, SSE4.2, SSE4A, SSSE3, x86-64 | AES, AMD-V, AVX, AVX2, AVX512, FMA3, MMX(+), SHA, SSE, SSE2, SSE3, SSE4.1, SSE4.2, SSE4A, SSSE3, x86-64 |
| Boost technology | Precision Boost 2 | Precision Boost 2 |
| Memory | ||
| Max memory size | 256 GB | 256 GB |
| Memory types | DDR5, LPDDR5 | DDR5, LPDDR5 |
| Memory channels | 2 | 2 |
| ECC memory supported | Yes | Yes |
| Memory speed (text) | 4x2R | DDR5-5600 | | | 4x2R | LPDDR5x-7500 | 4x2R | DDR5-5600 | | | 4x2R | LPDDR5x-7500 |
| Memory form factor | UDIMM | UDIMM |
| Graphics | ||
| Integrated graphics | AMD Radeon 780M | AMD Radeon 780M |
| Has integrated graphics | Yes | Yes |
| Graphics max frequency | 2.8 GHz | 2.7 GHz |
| Graphics units | 12 | 12 |
| Max displays | 4 | 4 |
| DirectX | 12 | 12 |
| DisplayPort over USB-C | Yes | Yes |
| HDCP version | 2.3 | 2.3 |
| Adaptive sync | Yes | Yes |
| DisplayPort version | 2.1 | 2.1 |
| HDMI version | 2.1 | 2.1 |
| Multi-display support | Yes | Yes |
| Wireless display | Miracast | Miracast |
| I/O and interfaces | ||
| PCI Express revision | 4 | 4 |
| PCI Express lanes | 20 | 20 |
| USB 2.0 ports | 4 | 4 |
| USB 3.2 Gen 2 ports | 2 | 2 |
| NVMe support | Boot, RAID0, RAID1, RAID10 | Boot, RAID0, RAID1, RAID10 |
| Package and thermal | ||
| Sockets supported | FP7, FP7r2, FP8 | FP7, FP7r2, FP8 |
| TJUNCTION | 100 °C | 100 °C |
| Die size | 178 mm² | 178 mm² |
| Security and virtualization | ||
| Execute Disable Bit | Yes | Yes |
| AMD PRO technologies | No | No |
| Technologies | ||
| Precision Boost Overdrive | Yes | Yes |
| AMD EXPO memory profiles | Yes | No |
| Curve Optimizer | Yes | No |
| Identifiers | ||
| Product ID (OEM) | 100-000000954 (FP7r2) 100-000000963 (FP7) 100-000001128 (FP8) | 100-000000955 (FP7r2) 100-000000964 (FP7) 100-000001129 (FP8) |