Celeron N4020C vs Atom E645CT
Primary details
Comparing Atom E645CT and Celeron N4020C processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | 2479 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Power efficiency | no data | 15.20 |
| Architecture codename | Stellarton (2010) | no data |
| Release date | 22 November 2010 (13 years ago) | 1 January 2021 (3 years ago) |
Detailed specifications
Atom E645CT and Celeron N4020C 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) | 2 (Dual-core) |
| Threads | 2 | 2 |
| Base clock speed | no data | 1.1 GHz |
| Boost clock speed | 1 GHz | 2.8 GHz |
| L1 cache | 64 KB (per core) | no data |
| L2 cache | 512 KB (per core) | no data |
| L3 cache | 0 KB | 4 MB |
| Chip lithography | 45 nm | 14 nm |
| Die size | 26 mm2 | no data |
| Maximum core temperature | no data | 105 °C |
| Number of transistors | 47 million | no data |
| 64 bit support | - | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Atom E645CT and Celeron N4020C 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 |
| Socket | Intel BGA1466 | FCBGA1090 |
| Power consumption (TDP) | 4 Watt | 6 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Atom E645CT and Celeron N4020C. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.2 |
| AES-NI | - | + |
| vPro | no data | - |
| Enhanced SpeedStep (EIST) | + | + |
| Speed Shift | no data | - |
| Turbo Boost Technology | no data | - |
| Hyper-Threading Technology | + | - |
| Idle States | no data | + |
| Thermal Monitoring | - | + |
| Smart Response | no data | - |
| GPIO | no data | + |
| Turbo Boost Max 3.0 | no data | - |
Security technologies
Atom E645CT and Celeron N4020C technologies aimed at improving security, for example, by protecting against hacks.
| EDB | no data | + |
| Secure Key | no data | + |
| MPX | - | + |
| Identity Protection | - | + |
| SGX | no data | Yes with Intel® ME |
| OS Guard | no data | + |
| Anti-Theft | no data | - |
Virtualization technologies
Virtual machine speed-up technologies supported by Atom E645CT and Celeron N4020C are enumerated here.
| VT-d | no data | + |
| VT-x | no data | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Atom E645CT and Celeron N4020C. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR2 | DDR4/LPDDR4 up to 2400 MT/s |
| Maximum memory size | no data | 8 GB |
| Max memory channels | no data | 2 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card Compare | Intel GMA 600 | Intel UHD Graphics 600 |
| Max video memory | no data | 8 GB |
| Quick Sync Video | - | + |
| Graphics max frequency | no data | 650 MHz |
| Execution Units | no data | 12 |
Graphics interfaces
Available interfaces and connections of Atom E645CT and Celeron N4020C integrated GPUs.
| Number of displays supported | no data | 3 |
| eDP | no data | + |
| DisplayPort | - | + |
| HDMI | - | + |
| MIPI-DSI | no data | + |
Graphics image quality
Maximum display resolutions supported by Atom E645CT and Celeron N4020C integrated GPUs, including resolutions over different interfaces.
| 4K resolution support | no data | + |
| Max resolution over HDMI 1.4 | no data | 4096x2160@30Hz |
| Max resolution over eDP | no data | 4096x2160@60Hz |
| Max resolution over DisplayPort | no data | 4096x2160@60Hz |
Graphics API support
APIs supported by Atom E645CT and Celeron N4020C integrated GPUs, sometimes API versions are included.
| DirectX | no data | 12 |
| OpenGL | no data | 4.4 |
Peripherals
Specifications and connection of peripherals supported by Atom E645CT and Celeron N4020C.
| PCIe version | no data | 2.0 |
| PCI Express lanes | no data | 6 |
| USB revision | no data | 2.0/3.0 |
| Total number of SATA ports | no data | 2 |
| Max number of SATA 6 Gb/s Ports | no data | 2 |
| Number of USB ports | no data | 8 |
| Integrated LAN | no data | - |
| UART | no data | + |
Pros & cons summary
| Recency | 22 November 2010 | 1 January 2021 |
| Physical cores | 1 | 2 |
| Chip lithography | 45 nm | 14 nm |
| Power consumption (TDP) | 4 Watt | 6 Watt |
Atom E645CT has 50% lower power consumption.
Celeron N4020C, on the other hand, has an age advantage of 10 years, 100% more physical cores, and a 221.4% more advanced lithography process.
We couldn't decide between Atom E645CT and Celeron N4020C. We've got no test results to judge.
Should you still have questions on choice between Atom E645CT and Celeron N4020C, ask them in Comments section, and we shall answer.
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