i5-8257U vs Celeron 420
Primary details
Comparing Celeron 420 and Core i5-8257U processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | 1266 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Laptop |
| Series | no data | Intel Core i5 |
| Power efficiency | no data | 29.65 |
| Architecture codename | Conroe-L (2007−2008) | Coffee Lake-U (2018−2019) |
| Release date | June 2007 (17 years ago) | 10 July 2019 (5 years ago) |
| Launch price (MSRP) | $23 | no data |
Detailed specifications
Celeron 420 and Core i5-8257U 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 | 8 |
| Base clock speed | 1.6 GHz | 1.4 GHz |
| Boost clock speed | 1.6 GHz | 3.9 GHz |
| Bus rate | no data | 4 GT/s |
| L1 cache | 64 KB | 256 KB |
| L2 cache | 512 KB | 1 MB |
| L3 cache | 0 KB | 6 MB |
| Chip lithography | 65 nm | 14 nm |
| Die size | 77 mm2 | no data |
| Maximum core temperature | no data | 100 °C |
| Maximum case temperature (TCase) | 60 °C | no data |
| Number of transistors | 105 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
| VID voltage range | 1V-1.3375V | no data |
Compatibility
Information on Celeron 420 and Core i5-8257U 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 | LGA775 | FCBGA1528 |
| Power consumption (TDP) | 35 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Celeron 420 and Core i5-8257U. 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 | - | + |
| Enhanced SpeedStep (EIST) | - | + |
| eDRAM | no data | 128 MB |
| Speed Shift | no data | + |
| My WiFi | no data | + |
| Turbo Boost Technology | - | 2.0 |
| Hyper-Threading Technology | - | + |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Flex Memory Access | no data | + |
| Demand Based Switching | - | no data |
| FSB parity | - | no data |
Security technologies
Celeron 420 and Core i5-8257U technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | - |
| EDB | + | + |
| 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 Celeron 420 and Core i5-8257U are enumerated here.
| AMD-V | - | + |
| VT-d | - | + |
| VT-x | - | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Celeron 420 and Core i5-8257U. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | DDR4 |
| Maximum memory size | no data | 32 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | no data | 37.5 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | Intel Iris Plus Graphics 645 |
| Max video memory | no data | 32 GB |
| Quick Sync Video | - | + |
| Clear Video | no data | + |
| Clear Video HD | no data | + |
| Graphics max frequency | no data | 1.05 GHz |
| InTru 3D | no data | + |
Graphics interfaces
Available interfaces and connections of Celeron 420 and Core i5-8257U 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 Celeron 420 and Core i5-8257U 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 |
Graphics API support
APIs supported by Celeron 420 and Core i5-8257U integrated GPUs, sometimes API versions are included.
| DirectX | no data | 12 |
| OpenGL | no data | 4.5 |
Peripherals
Specifications and connection of peripherals supported by Celeron 420 and Core i5-8257U.
| PCIe version | no data | 3.0 |
| PCI Express lanes | no data | 16 |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
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
| Physical cores | 1 | 4 |
| Threads | 1 | 8 |
| Chip lithography | 65 nm | 14 nm |
| Power consumption (TDP) | 35 Watt | 15 Watt |
i5-8257U has 300% more physical cores and 700% more threads, a 364.3% more advanced lithography process, and 133.3% lower power consumption.
We couldn't decide between Celeron 420 and Core i5-8257U. We've got no test results to judge.
Note that Celeron 420 is a desktop processor while Core i5-8257U is a notebook one.
Should you still have questions on choice between Celeron 420 and Core i5-8257U, ask them in Comments section, and we shall answer.
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