Atom x5-E3940 vs Celeron J3455
Aggregate performance score
Celeron J3455 outperforms Atom x5-E3940 by a moderate 16% based on our aggregate benchmark results.
Primary details
Comparing Celeron J3455 and Atom x5-E3940 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2190 | 2307 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.15 | no data |
| Market segment | Desktop processor | Laptop |
| Series | Intel Celeron | 5x Intel Atom |
| Power efficiency | 13.47 | 11.61 |
| Architecture codename | Apollo Lake (2014−2016) | Apollo Lake (2014−2016) |
| Release date | 30 August 2016 (8 years ago) | 30 August 2014 (10 years ago) |
| Launch price (MSRP) | $107 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Celeron J3455 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 | 4 (Quad-Core) | 4 (Quad-Core) |
| Threads | 4 | 4 |
| Base clock speed | 1.5 GHz | 1.6 GHz |
| Boost clock speed | 2.3 GHz | 1.8 GHz |
| Multiplier | 15 | no data |
| L1 cache | no data | 56K (per core) |
| L2 cache | 2 MB | 2 MB (shared) |
| L3 cache | 0 KB | 0 KB |
| Chip lithography | 14 nm | 14 nm |
| Maximum core temperature | 105 °C | no data |
| Maximum case temperature (TCase) | no data | 103 °C |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Celeron J3455 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 (Uniprocessor) | 1 (Uniprocessor) |
| Socket | FCBGA1296 | Intel BGA 1296 |
| Power consumption (TDP) | 10 Watt | 10 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Celeron J3455 and Atom x5-E3940. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | - | no data |
| Hyper-Threading Technology | - | no data |
| Idle States | + | no data |
| Thermal Monitoring | + | - |
| Smart Response | - | no data |
| GPIO | + | no data |
| Smart Connect | - | no data |
| HD Audio | + | no data |
| RST | - | no data |
Security technologies
Celeron J3455 and Atom x5-E3940 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | + |
| EDB | + | no data |
| Secure Boot | + | no data |
| Secure Key | + | no data |
| Identity Protection | + | - |
| OS Guard | - | no data |
| Anti-Theft | - | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Celeron J3455 and Atom x5-E3940 are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| VT-i | - | no data |
| EPT | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Celeron J3455 and Atom x5-E3940. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3L/LPDDR3 up to 1866 MT/s; LPDDR4 up to 2400 MT/s | DDR3-1866 |
| Maximum memory size | 8 GB | 8 GB |
| Max memory channels | 2 | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel HD Graphics 500 | Intel HD Graphics 500 |
| Max video memory | 8 GB | no data |
| Quick Sync Video | + | - |
| Clear Video | + | no data |
| Clear Video HD | + | no data |
| Graphics max frequency | 750 MHz | no data |
| Execution Units | 12 | no data |
Graphics interfaces
Available interfaces and connections of Celeron J3455 and Atom x5-E3940 integrated GPUs.
| Number of displays supported | 3 | no data |
| eDP | + | no data |
| DisplayPort | + | - |
| HDMI | + | - |
| MIPI-DSI | + | no data |
Graphics API support
APIs supported by Celeron J3455 and Atom x5-E3940 integrated GPUs, sometimes API versions are included.
| DirectX | + | no data |
| OpenGL | + | no data |
Peripherals
Specifications and connection of peripherals supported by Celeron J3455 and Atom x5-E3940.
| PCIe version | 2.0 | 2.0 |
| PCI Express lanes | 6 | 4 |
| USB revision | 2.0/3.0 | no data |
| Total number of SATA ports | 2 | no data |
| Max number of SATA 6 Gb/s Ports | 2 | no data |
| Number of USB ports | 8 | no data |
| Integrated LAN | - | no data |
| UART | + | no data |
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 | 1.45 | 1.25 |
| Recency | 30 August 2016 | 30 August 2014 |
Celeron J3455 has a 16% higher aggregate performance score, and an age advantage of 2 years.
The Celeron J3455 is our recommended choice as it beats the Atom x5-E3940 in performance tests.
Note that Celeron J3455 is a desktop processor while Atom x5-E3940 is a notebook one.
Should you still have questions on choice between Celeron J3455 and Atom x5-E3940, ask them in Comments section, and we shall answer.
Similar processor comparisons
We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.
