Atom x5-E3940 vs E3815
Aggregate performance score
Atom x5-E3940 outperforms Atom E3815 by a whopping 925% based on our aggregate benchmark results.
Primary details
Comparing Atom E3815 and Atom x5-E3940 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 3365 | 2325 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | Atom | 5x Intel Atom |
| Power efficiency | 2.27 | 11.64 |
| Architecture codename | Bay Trail-I (2013) | Apollo Lake (2014−2016) |
| Release date | 8 October 2013 (11 years ago) | 30 August 2014 (10 years ago) |
| Launch price (MSRP) | $134 | no data |
Detailed specifications
Atom E3815 and Atom x5-E3940 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 | 1 (Single-Core) | 4 (Quad-Core) |
| Threads | 1 | 4 |
| Base clock speed | no data | 1.6 GHz |
| Boost clock speed | 1.47 GHz | 1.8 GHz |
| L1 cache | 64 KB (per core) | 56K (per core) |
| L2 cache | 512 KB (per core) | 2 MB (shared) |
| L3 cache | 0 KB | 0 KB |
| Chip lithography | 22 nm | 14 nm |
| Maximum case temperature (TCase) | no data | 103 °C |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Atom E3815 and Atom x5-E3940 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 | 1 (Uniprocessor) |
| Socket | Intel BGA1170 | Intel BGA 1296 |
| Power consumption (TDP) | 5 Watt | 10 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Atom E3815 and Atom x5-E3940. You'll probably need this information if you require some particular technology.
| AES-NI | - | + |
| Enhanced SpeedStep (EIST) | + | + |
Security technologies
Atom E3815 and Atom x5-E3940 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Atom E3815 and Atom x5-E3940 are enumerated here.
| VT-d | no data | + |
| VT-x | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Atom E3815 and Atom x5-E3940. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR3-1866 |
| Maximum memory size | no data | 8 GB |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card Compare | Intel HD Graphics | Intel HD Graphics 500 |
Peripherals
Specifications and connection of peripherals supported by Atom E3815 and Atom x5-E3940.
| PCIe version | no data | 2.0 |
| PCI Express lanes | no data | 4 |
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 | 0.12 | 1.23 |
| Recency | 8 October 2013 | 30 August 2014 |
| Physical cores | 1 | 4 |
| Threads | 1 | 4 |
| Chip lithography | 22 nm | 14 nm |
| Power consumption (TDP) | 5 Watt | 10 Watt |
Atom E3815 has 100% lower power consumption.
Atom x5-E3940, on the other hand, has a 925% higher aggregate performance score, an age advantage of 10 months, 300% more physical cores and 300% more threads, and a 57.1% more advanced lithography process.
The Atom x5-E3940 is our recommended choice as it beats the Atom E3815 in performance tests.
Should you still have questions on choice between Atom E3815 and Atom x5-E3940, ask them in Comments section, and we shall answer.
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