Ryzen 3 5400U vs Ryzen 7 7840S
Aggregate performance score
Ryzen 7 7840S outperforms Ryzen 3 5400U by a whopping 123% based on our aggregate benchmark results.
Primary details
Comparing Ryzen 7 7840S and Ryzen 3 5400U processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 398 | 934 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | Phoenix (Zen 4, Ryzen 7040) | AMD Cezanne (Zen 3, Ryzen 5000) |
| Architecture codename | Phoenix-HS (Zen 4) | Cezanne-U (Zen 3) |
| Release date | 5 January 2023 (1 year ago) | 12 January 2021 (3 years ago) |
Detailed specifications
Ryzen 7 7840S and Ryzen 3 5400U 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) | 4 (Quad-Core) |
| Threads | 16 | 8 |
| Base clock speed | 3.8 GHz | 2.6 GHz |
| Boost clock speed | 5.1 GHz | 4 GHz |
| L1 cache | 512 KB | 64K (per core) |
| L2 cache | 8 MB | 512K (per core) |
| L3 cache | 16 MB | 8 MB (shared) |
| Chip lithography | 4 nm | 7 nm |
| Die size | 178 mm2 | 180 mm2 |
| Maximum core temperature | 100 °C | 105 °C |
| Number of transistors | no data | 10,700 million |
| 64 bit support | + | + |
| Windows 11 compatibility | + | + |
| Unlocked multiplier | No | No |
Compatibility
Information on Ryzen 7 7840S and Ryzen 3 5400U 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 | FP6 |
| Power consumption (TDP) | 35 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 7 7840S and Ryzen 3 5400U. You'll probably need this information if you require some particular technology.
| Instruction set extensions | DDR5-5600/LPDDR5x-7500 RAM (incl. ECC), PCIe 4, 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 | DDR4-3200/LPDDR4-4266 RAM, PCIe 3, MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, BMI2, ABM, FMA, ADX, SMEP, SMAP, SMT, CPB, AES-NI, RDRAND, RDSEED, SHA, SME |
| AES-NI | + | + |
| FMA | + | + |
| AVX | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 7 7840S and Ryzen 3 5400U are enumerated here.
| AMD-V | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 7 7840S and Ryzen 3 5400U. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5 | DDR4 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card Compare | AMD Radeon 780M | AMD Radeon RX Vega 6 (Ryzen 4000/5000) |
Peripherals
Specifications and connection of peripherals supported by Ryzen 7 7840S and Ryzen 3 5400U.
| PCIe version | no data | 3.0 |
| PCI Express lanes | no data | 8 |
Synthetic benchmark performance
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. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
Ryzen 7 7840S outperforms Ryzen 3 5400U by 123% based on our aggregate benchmark results.
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.
Benchmark coverage: 68%
Ryzen 7 7840S outperforms Ryzen 3 5400U by 123% in Passmark.
Pros & cons summary
| Performance score | 15.93 | 7.13 |
| Integrated graphics card | 18.35 | 6.26 |
| Recency | 5 January 2023 | 12 January 2021 |
| Physical cores | 8 | 4 |
| Threads | 16 | 8 |
| Chip lithography | 4 nm | 7 nm |
| Power consumption (TDP) | 35 Watt | 15 Watt |
The Ryzen 7 7840S is our recommended choice as it beats the Ryzen 3 5400U in performance tests.
Should you still have questions on choice between Ryzen 7 7840S and Ryzen 3 5400U, ask them in Comments section, and we shall answer.
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