i5-8400H vs Atom E665C
Primary details
Comparing Atom E665C and Core i5-8400H processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | 1244 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | no data | Intel Core i5 |
| Power efficiency | no data | 10.12 |
| Architecture codename | Stellarton (2010) | Coffee Lake-H (2018−2019) |
| Release date | 22 November 2010 (14 years ago) | 2 April 2018 (6 years ago) |
| Launch price (MSRP) | no data | $250 |
Detailed specifications
Atom E665C and Core i5-8400H 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 | 2 | 8 |
| Base clock speed | no data | 2.5 GHz |
| Boost clock speed | 1.3 GHz | 4.2 GHz |
| Bus type | no data | DMI 3.0 |
| Bus rate | no data | 4 × 8 GT/s |
| Multiplier | no data | 25 |
| L1 cache | 64 KB (per core) | 64K (per core) |
| L2 cache | 512 KB (per core) | 256K (per core) |
| L3 cache | 0 KB | 12 MB (shared) |
| Chip lithography | 45 nm | 14 nm |
| Die size | 26 mm2 | 126 mm2 |
| Maximum core temperature | no data | 100 °C |
| Maximum case temperature (TCase) | no data | 72 °C |
| Number of transistors | 47 million | no data |
| 64 bit support | - | + |
| Windows 11 compatibility | - | + |
Compatibility
Information on Atom E665C and Core i5-8400H 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 BGA1466 | FCBGA1440 |
| Power consumption (TDP) | 4 Watt | 45 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Atom E665C and Core i5-8400H. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 |
| AES-NI | - | + |
| AVX | - | + |
| vPro | no data | + |
| Enhanced SpeedStep (EIST) | + | + |
| Speed Shift | no data | + |
| My WiFi | no data | + |
| Turbo Boost Technology | no data | 2.0 |
| Hyper-Threading Technology | + | + |
| TSX | - | + |
| Idle States | no data | + |
| Thermal Monitoring | - | + |
| Flex Memory Access | no data | + |
| SIPP | - | + |
Security technologies
Atom E665C and Core i5-8400H technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | + |
| EDB | no data | + |
| Secure Key | no data | + |
| MPX | - | + |
| Identity Protection | - | + |
| SGX | no data | Yes with Intel® ME |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Atom E665C and Core i5-8400H are enumerated here.
| AMD-V | - | + |
| VT-d | no data | + |
| VT-x | no data | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Atom E665C and Core i5-8400H. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR2 | DDR4 |
| Maximum memory size | no data | 64 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | no data | 42.671 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card Compare | Intel GMA 600 | Intel UHD Graphics 630 |
| Max video memory | no data | 64 GB |
| Quick Sync Video | - | + |
| Clear Video | no data | + |
| Clear Video HD | no data | + |
| Graphics max frequency | no data | 1.1 GHz |
| InTru 3D | no data | + |
Graphics interfaces
Available interfaces and connections of Atom E665C and Core i5-8400H integrated GPUs.
| Number of displays supported | no data | 3 |
| eDP | no data | + |
| DisplayPort | - | + |
| HDMI | - | + |
| DVI | no data | + |
Graphics image quality
Maximum display resolutions supported by Atom E665C and Core i5-8400H integrated GPUs, including resolutions over different interfaces.
| 4K resolution support | no data | + |
| Max resolution over HDMI 1.4 | no data | 4096x2304@30Hz |
| Max resolution over eDP | no data | 4096x2304@60Hz |
| Max resolution over DisplayPort | no data | 4096x2304@60Hz |
| Max resolution over VGA | no data | N/A |
Graphics API support
APIs supported by Atom E665C and Core i5-8400H integrated GPUs, sometimes API versions are included.
| DirectX | no data | 12 |
| OpenGL | no data | 4.5 |
Peripherals
Specifications and connection of peripherals supported by Atom E665C and Core i5-8400H.
| PCIe version | no data | 3.0 |
| PCI Express lanes | no data | 16 |
Pros & cons summary
| Recency | 22 November 2010 | 2 April 2018 |
| Physical cores | 1 | 4 |
| Threads | 2 | 8 |
| Chip lithography | 45 nm | 14 nm |
| Power consumption (TDP) | 4 Watt | 45 Watt |
Atom E665C has 1025% lower power consumption.
i5-8400H, on the other hand, has an age advantage of 7 years, 300% more physical cores and 300% more threads, and a 221.4% more advanced lithography process.
We couldn't decide between Atom E665C and Core i5-8400H. We've got no test results to judge.
Should you still have questions on choice between Atom E665C and Core i5-8400H, ask them in Comments section, and we shall answer.
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