Ryzen 5 7400 vs Ryzen 7 7840S
Aggregate performance score
Ryzen 7 7840S outperforms Ryzen 5 7400 by a small 5% based on our aggregate benchmark results.
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 611 | 656 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Desktop processor |
| Series | Phoenix (Zen 4, Ryzen 7040) | no data |
| Power efficiency | 15.90 | 8.14 |
| Designer | AMD | AMD |
| Manufacturer | no data | TSMC |
| Architecture codename | Phoenix-HS (Zen 4) (2023) | Raphael (2023−2025) |
| Release date | 5 January 2023 (2 years ago) | 16 September 2025 (recently) |
Detailed specifications
Ryzen 7 7840S and Ryzen 5 7400 basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.
| Physical cores | 8 (Octa-Core) | 6 (Hexa-Core) |
| Threads | 16 | 12 |
| Base clock speed | 3.8 GHz | 3.3 GHz |
| Boost clock speed | 5.1 GHz | 4.3 GHz |
| L1 cache | 512 KB | 64 KB (per core) |
| L2 cache | 8 MB | 1 MB (per core) |
| L3 cache | 16 MB | 16 MB (shared) |
| Chip lithography | 4 nm | 5 nm |
| Die size | 178 mm2 | 71 mm2 |
| Maximum core temperature | 100 °C | no data |
| Maximum case temperature (TCase) | no data | 61 °C |
| Number of transistors | no data | 6,570 million |
| 64 bit support | + | + |
| Windows 11 compatibility | + | no data |
| Unlocked multiplier | - | + |
Compatibility
Information on Ryzen 7 7840S and Ryzen 5 7400 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.
| Number of CPUs in a configuration | no data | 1 |
| Socket | FP7/FP7r2/FP8 | AM5 |
| Power consumption (TDP) | 35 Watt | 65 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 7 7840S and Ryzen 5 7400. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Ryzen AI, MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, AVX-512, BMI2, ABM, FMA, ADX, SMEP, SMAP, SMT, CPB, AES-NI, RDRAND, RDSEED, SHA, SME | no data |
| AES-NI | + | + |
| FMA | + | - |
| AVX | + | + |
| Precision Boost 2 | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 7 7840S and Ryzen 5 7400 are enumerated here.
| AMD-V | - | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 7 7840S and Ryzen 5 7400. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5 | DDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | AMD Radeon 780M ( - 2700 MHz) | AMD Radeon Graphics |
Peripherals
Specifications and connection of peripherals supported by Ryzen 7 7840S and Ryzen 5 7400.
| PCIe version | no data | 5.0 |
| PCI Express lanes | no data | 24 |
Synthetic benchmarks
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating.
Passmark
Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance. Other than that, Passmark measures multi-core performance.
Pros & cons summary
| Performance score | 13.17 | 12.52 |
| Integrated graphics card | 15.66 | 1.73 |
| Recency | 5 January 2023 | 16 September 2025 |
| Physical cores | 8 | 6 |
| Threads | 16 | 12 |
| Chip lithography | 4 nm | 5 nm |
| Power consumption (TDP) | 35 Watt | 65 Watt |
Ryzen 7 7840S has a 5.2% higher aggregate performance score, 805.2% faster integrated GPU, 33.3% more physical cores and 33.3% more threads, a 25% more advanced lithography process, and 85.7% lower power consumption.
Ryzen 5 7400, on the other hand, has an age advantage of 2 years.
Given the minimal performance differences, no clear winner can be declared between AMD Ryzen 7 7840S and AMD Ryzen 5 7400.
Be aware that Ryzen 7 7840S is a notebook processor while Ryzen 5 7400 is a desktop one.
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