Ryzen 5 8400F vs Atom x5-E3940
Aggregate performance score
Ryzen 5 8400F outperforms Atom x5-E3940 by a whopping 1106% based on our aggregate benchmark results.
Primary details
Comparing Atom x5-E3940 and Ryzen 5 8400F processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2300 | 467 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 61.40 |
| Market segment | Laptop | Desktop processor |
| Series | 5x Intel Atom | no data |
| Power efficiency | 11.67 | 21.66 |
| Architecture codename | Apollo Lake (2014−2016) | Phoenix (2023−2024) |
| Release date | 30 August 2014 (10 years ago) | 1 April 2024 (less than a year ago) |
| Launch price (MSRP) | no data | $170 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Atom x5-E3940 and Ryzen 5 8400F 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 | 4 (Quad-Core) | 6 (Hexa-Core) |
| Threads | 4 | 12 |
| Base clock speed | 1.6 GHz | 4.2 GHz |
| Boost clock speed | 1.8 GHz | 4.7 GHz |
| L1 cache | 56K (per core) | 64 KB (per core) |
| L2 cache | 2 MB (shared) | 1 MB (per core) |
| L3 cache | 0 KB | 16 MB (shared) |
| Chip lithography | 14 nm | 4 nm |
| Die size | no data | 178 mm2 |
| Maximum case temperature (TCase) | 103 °C | no data |
| Number of transistors | no data | 25,000 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
| Unlocked multiplier | - | + |
Compatibility
Information on Atom x5-E3940 and Ryzen 5 8400F 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 | 1 (Uniprocessor) | 1 |
| Socket | Intel BGA 1296 | AM5 |
| Power consumption (TDP) | 10 Watt | 65 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Atom x5-E3940 and Ryzen 5 8400F. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| AVX | - | + |
| Enhanced SpeedStep (EIST) | + | no data |
| Precision Boost 2 | no data | + |
Security technologies
Atom x5-E3940 and Ryzen 5 8400F technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Atom x5-E3940 and Ryzen 5 8400F are enumerated here.
| AMD-V | - | + |
| VT-d | + | no data |
| VT-x | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Atom x5-E3940 and Ryzen 5 8400F. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3-1866 | DDR5 |
| Maximum memory size | 8 GB | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel HD Graphics 500 | N/A |
Peripherals
Specifications and connection of peripherals supported by Atom x5-E3940 and Ryzen 5 8400F.
| PCIe version | 2.0 | 4.0 |
| PCI Express lanes | 4 | 20 |
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.
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.
Pros & cons summary
| Performance score | 1.28 | 15.44 |
| Recency | 30 August 2014 | 1 April 2024 |
| Physical cores | 4 | 6 |
| Threads | 4 | 12 |
| Chip lithography | 14 nm | 4 nm |
| Power consumption (TDP) | 10 Watt | 65 Watt |
Atom x5-E3940 has 550% lower power consumption.
Ryzen 5 8400F, on the other hand, has a 1106.3% higher aggregate performance score, an age advantage of 9 years, 50% more physical cores and 200% more threads, and a 250% more advanced lithography process.
The Ryzen 5 8400F is our recommended choice as it beats the Atom x5-E3940 in performance tests.
Be aware that Atom x5-E3940 is a notebook processor while Ryzen 5 8400F is a desktop one.
Should you still have questions on choice between Atom x5-E3940 and Ryzen 5 8400F, ask them in Comments section, and we shall answer.
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