Intel Core i7-1255UL vs Intel Celeron 420
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CPU comparison with benchmarks
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| Intel Core i7-1255UL | Intel Celeron 420 | |
CPU comparisonIntel Core i7-1255UL or Intel Celeron 420 - which processor is faster? In this comparison we look at the differences and analyze which of these two CPUs is better. We compare the technical data and benchmark results.
The Intel Core i7-1255UL has 10 cores with 12 threads and clocks with a maximum frequency of 4.70 GHz. Up to 64 GB of memory is supported in 2 memory channels. The Intel Core i7-1255UL was released in Q3/2022. The Intel Celeron 420 has 1 cores with 1 threads and clocks with a maximum frequency of 1.60 GHz. The CPU supports up to 16 GB of memory in 2 memory channels. The Intel Celeron 420 was released in Q2/2007. |
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| Intel Core i7 (298) | Family | Intel Celeron (165) |
| Intel Core i 1200P/1200U (21) | CPU group | Intel Celeron 400 (4) |
| 12 | Generation | 1 |
| Alder Lake U | Architecture | Conroe (Core) |
| Mobile | Segment | Desktop / Server |
| -- | Predecessor | -- |
| -- | Successor | -- |
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CPU Cores and Base FrequencyThe Intel Core i7-1255UL is a 10 core processor with a clock frequency of 2.60 GHz (4.70 GHz). The Intel Celeron 420 has 1 CPU cores with a clock frequency of 1.60 GHz. |
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| Intel Core i7-1255UL | Characteristic | Intel Celeron 420 |
| 10 | Cores | 1 |
| 12 | Threads | 1 |
| hybrid (big.LITTLE) | Core architecture | normal |
| Yes | Hyperthreading | No |
| No | Overclocking ? | No |
| 2.60 GHz (4.70 GHz) 2x Golden Cove |
A-Core | 1.60 GHz 1x Core |
| 1.20 GHz (3.50 GHz) 8x Gracemont |
B-Core | -- |
Integrated graphics (iGPU)The integrated graphics unit of a processor is not only responsible for the pure image output on the system, but can also significantly increase the efficiency of the system with the support of modern video codecs. |
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| Intel Iris Xe Graphics 96 (Alder Lake) | GPU | no iGPU |
| 0.35 GHz | GPU frequency | -- |
| 1.25 GHz | GPU (Turbo) | -- |
| 13 | GPU Generation | -- |
| 10 nm | Technology | |
| 4 | Max. displays | |
| 96 | Compute units | -- |
| 768 | Shader | -- |
| No | Hardware Raytracing | No |
| No | Frame Generation | No |
| 32 GB | Max. GPU Memory | -- |
| 12.1 | DirectX Version | -- |
Hardware codec supportA photo or video codec that is accelerated in hardware can greatly accelerate the working speed of a processor and extend the battery life of notebooks or smartphones when playing videos. |
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| Intel Iris Xe Graphics 96 (Alder Lake) | GPU | no iGPU |
| Decode / Encode | Codec h265 / HEVC (8 bit) | No |
| Decode / Encode | Codec h265 / HEVC (10 bit) | No |
| Decode / Encode | Codec h264 | No |
| Decode / Encode | Codec VP9 | No |
| Decode | Codec VP8 | No |
| Decode | Codec AV1 | No |
| Decode / Encode | Codec AVC | No |
| Decode | Codec VC-1 | No |
| Decode / Encode | Codec JPEG | No |
Memory & PCIeThe Intel Core i7-1255UL supports a maximum of 64 GB of memory in 2 memory channels. The Intel Celeron 420 can connect up to 16 GB of memory in 2 memory channels. |
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| Intel Core i7-1255UL | Characteristic | Intel Celeron 420 |
| DDR5-4800, DDR4-3200 | Memory | DDR3-1066, DDR2-800 |
| 64 GB | Max. Memory | 16 GB |
| 2 (Dual Channel) | Memory channels | 2 (Dual Channel) |
| 76.8 GB/s | Max. Bandwidth | 17.1 GB/s |
| No | ECC | No |
| 6.50 MB | L2 Cache | 0.50 MB |
| 12.00 MB | L3 Cache | -- |
| 4.0 | PCIe version | -- |
| 28 | PCIe lanes | -- |
| 55.1 GB/s | PCIe Bandwidth | -- |
Thermal ManagementThe TDP (Thermal Design Power) of a processor specifies the required cooling solution. The Intel Core i7-1255UL has a TDP of 15 W, that of the Intel Celeron 420 is 35 W. |
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| Intel Core i7-1255UL | Characteristic | Intel Celeron 420 |
| 15 W | TDP (PL1 / PBP) | 35 W |
| 55 W | TDP (PL2) | -- |
| 28 W | TDP up | -- |
| 12 W | TDP down | -- |
| 100 °C | Tjunction max. | -- |
Technical detailsThe Intel Core i7-1255UL has a 18.50 MB cache, while the Intel Celeron 420 cache has a total of 0.50 MB. |
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| Intel Core i7-1255UL | Characteristic | Intel Celeron 420 |
| 10 nm | Technology | 65 nm |
| Monolithic | Chip design | Monolithic |
| x86-64 (64 bit) | Instruction set (ISA) | x86-64 (64 bit) |
| SSE4.1, SSE4.2, AVX2 | ISA extensions | MMX, SSE, SSE2, SSE3 |
| BGA 1744 | Socket | LGA 775 |
| VT-x, VT-x EPT, VT-d | Virtualization | None |
| Yes | AES-NI | No |
| Windows 10, Windows 11, Linux | Operating systems | Windows 10, Linux |
| Q3/2022 | Release date | Q2/2007 |
| -- | Release price | -- |
| show more data | show more data | |
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Rate these processors
Geekbench 5, 64bit (Single-Core)
Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
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Intel Core i7-1255UL
10C 12T @ 4.70 GHz |
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Intel Celeron 420
1C 1T @ 1.60 GHz |
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Geekbench 5, 64bit (Multi-Core)
Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
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Intel Core i7-1255UL
10C 12T @ 3.30 GHz |
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Intel Celeron 420
1C 1T @ 1.60 GHz |
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iGPU - FP32 Performance (Single-precision GFLOPS)
The theoretical computing performance of the internal graphics unit of the processor with simple accuracy (32 bit) in GFLOPS. GFLOPS indicates how many billion floating point operations the iGPU can perform per second.
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Intel Core i7-1255UL
Intel Iris Xe Graphics 96 (Alder Lake) @ 1.25 GHz |
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Intel Celeron 420
@ 0.00 GHz |
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Estimated results for PassMark CPU Mark
Some of the CPUs listed below have been benchmarked by CPU-monkey. However the majority of CPUs have not been tested and the results have been estimated by a CPU-monkey’s secret proprietary formula. As such they do not accurately reflect the actual Passmark CPU mark values and are not endorsed by PassMark Software Pty Ltd.
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Intel Core i7-1255UL
10C 12T @ 3.30 GHz |
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Intel Celeron 420
1C 1T @ 1.60 GHz |
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Devices using this processor |
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| Intel Core i7-1255UL | Intel Celeron 420 |
| Unknown | Unknown |
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