Intel Celeron 3855U vs AMD Ryzen 7 7840H
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CPU comparison with benchmarks
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| Intel Celeron 3855U | AMD Ryzen 7 7840H | |
CPU comparisonIntel Celeron 3855U or AMD Ryzen 7 7840H - 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 Celeron 3855U has 2 cores with 2 threads and clocks with a maximum frequency of 1.60 GHz. Up to 32 GB of memory is supported in 2 memory channels. The Intel Celeron 3855U was released in Q4/2015. The AMD Ryzen 7 7840H has 8 cores with 16 threads and clocks with a maximum frequency of 5.10 GHz. The CPU supports up to 256 GB of memory in 2 memory channels. The AMD Ryzen 7 7840H was released in Q1/2023. |
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| Intel Celeron (165) | Family | AMD Ryzen 7 (70) |
| Intel Celeron 3000 (10) | CPU group | AMD Ryzen 7040 (21) |
| 7 | Generation | 6 |
| Kaby Lake U | Architecture | Phoenix (Zen 4) |
| Mobile | Segment | Mobile |
| -- | Predecessor | -- |
| -- | Successor | -- |
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CPU Cores and Base FrequencyThe Intel Celeron 3855U has 2 CPU cores and can calculate 2 threads in parallel. The clock frequency of the Intel Celeron 3855U is 1.60 GHz while the AMD Ryzen 7 7840H has 8 CPU cores and 16 threads can calculate simultaneously. The clock frequency of the AMD Ryzen 7 7840H is at 3.80 GHz (5.10 GHz). |
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| Intel Celeron 3855U | Characteristic | AMD Ryzen 7 7840H |
| 2 | Cores | 8 |
| 2 | Threads | 16 |
| normal | Core architecture | normal |
| No | Hyperthreading | Yes |
| No | Overclocking ? | No |
| 1.60 GHz | Frequency | 3.80 GHz |
| -- | Turbo Frequency (1 Core) | 5.10 GHz |
| -- | Turbo Frequency (All Cores) | 4.25 GHz |
NPU AI performanceThe performance values of the processor's AI unit. The isolated NPU performance is specified here, the total AI performance (NPU+CPU+iGPU) can be higher. Processors with support for artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors. |
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| Intel Celeron 3855U | Characteristic | AMD Ryzen 7 7840H |
| -- | AI hardware | AMD Ryzen™ AI |
| -- | AI specifications | AMD dedicated AI XDNA Technology |
| -- | NPU + CPU + iGPU | -- |
Integrated graphics (iGPU)The Intel Celeron 3855U or AMD Ryzen 7 7840H has integrated graphics, called iGPU for short. The iGPU uses the system's main memory as graphics memory and sits on the processor's die. |
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| Intel HD Graphics 510 | GPU | AMD Radeon 780M |
| 0.30 GHz | GPU frequency | 0.80 GHz |
| 0.90 GHz | GPU (Turbo) | 2.70 GHz |
| 9 | GPU Generation | 3 |
| 14 nm | Technology | 4 nm |
| 3 | Max. displays | 4 |
| 12 | Compute units | 12 |
| 96 | Shader | 768 |
| No | Hardware Raytracing | Yes |
| No | Frame Generation | AMD FSR |
| 32 GB | Max. GPU Memory | 32 GB |
| 12.0 | DirectX Version | 12 |
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 HD Graphics 510 | GPU | AMD Radeon 780M |
| Decode / Encode | Codec h265 / HEVC (8 bit) | Decode / Encode |
| Decode | Codec h265 / HEVC (10 bit) | Decode / Encode |
| Decode / Encode | Codec h264 | Decode / Encode |
| Decode | Codec VP9 | Decode |
| Decode / Encode | Codec VP8 | Decode |
| No | Codec AV1 | Decode / Encode |
| Decode / Encode | Codec AVC | Decode |
| Decode | Codec VC-1 | Decode |
| Decode | Codec JPEG | Decode / Encode |
Memory & PCIeThe Intel Celeron 3855U can use up to 32 GB of memory in 2 memory channels. The maximum memory bandwidth is 34.1 GB/s. The AMD Ryzen 7 7840H supports up to 256 GB of memory in 2 memory channels and achieves a memory bandwidth of up to 120.0 GB/s. |
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| Intel Celeron 3855U | Characteristic | AMD Ryzen 7 7840H |
| LPDDR3-1866, DDR4-2133, DDR3L-1600 | Memory | DDR5-4800, DDR5-5600, LPDDR5-6400, LPDDR5X-7500 |
| 32 GB | Max. Memory | 256 GB |
| 2 (Dual Channel) | Memory channels | 2 (Dual Channel) |
| 34.1 GB/s | Max. Bandwidth | 120.0 GB/s |
| No | ECC | Yes |
| -- | L2 Cache | 8.00 MB |
| 2.00 MB | L3 Cache | 16.00 MB |
| 2.0 | PCIe version | 4.0 |
| 10 | PCIe lanes | 20 |
| 5.0 GB/s | PCIe Bandwidth | 39.4 GB/s |
Thermal ManagementThe thermal design power (TDP for short) of the Intel Celeron 3855U is 15 W, while the AMD Ryzen 7 7840H has a TDP of 54 W. The TDP specifies the necessary cooling solution that is required to cool the processor sufficiently. |
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| Intel Celeron 3855U | Characteristic | AMD Ryzen 7 7840H |
| 15 W | TDP (PL1 / PBP) | 54 W |
| -- | TDP (PL2) | -- |
| -- | TDP up | 60 W |
| 10 W | TDP down | 35 W |
| 100 °C | Tjunction max. | 100 °C |
Technical detailsThe Intel Celeron 3855U is manufactured in 14 nm and has 2.00 MB cache. The AMD Ryzen 7 7840H is manufactured in 4 nm and has a 24.00 MB cache. |
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| Intel Celeron 3855U | Characteristic | AMD Ryzen 7 7840H |
| 14 nm | Technology | 4 nm |
| Monolithic | Chip design | Monolithic |
| x86-64 (64 bit) | Instruction set (ISA) | x86-64 (64 bit) |
| SSE4.1, SSE4.2 | ISA extensions | SSE4a, SSE4.1, SSE4.2,FMA3, AVX2, AVX512 |
| -- | Socket | FP8 |
| VT-x, VT-x EPT, VT-d | Virtualization | AMD-V, SVM |
| Yes | AES-NI | Yes |
| Windows 10, Linux | Operating systems | Windows 10, Windows 11, Linux |
| Q4/2015 | Release date | Q1/2023 |
| 107 $ | Release price | -- |
| show more data | show more data | |
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8C 16T @ 3.80 GHz (5.10 GHz) buy now on Amazon and save!
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Rate these processors
Average performance in benchmarks
⌀ Single core performance in 2 CPU benchmarks
⌀ Multi core performance in 3 CPU benchmarks
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 Celeron 3855U
2C 2T @ 1.60 GHz |
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AMD Ryzen 7 7840H
8C 16T @ 5.10 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 Celeron 3855U
2C 2T @ 1.60 GHz |
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AMD Ryzen 7 7840H
8C 16T @ 4.25 GHz |
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Geekbench 6 (Single-Core)
Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The single-core benchmark only evaluates the performance of the fastest CPU core, the number of CPU cores in a processor is irrelevant here.
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Intel Celeron 3855U
2C 2T @ 1.60 GHz |
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AMD Ryzen 7 7840H
8C 16T @ 5.10 GHz |
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Geekbench 6 (Multi-Core)
Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The multi-core benchmark evaluates the performance of all of the processor's CPU cores. Virtual thread improvements such as AMD SMT or Intel's Hyper-Threading have a positive impact on the benchmark result.
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Intel Celeron 3855U
2C 2T @ 1.60 GHz |
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AMD Ryzen 7 7840H
8C 16T @ 4.25 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 Celeron 3855U
Intel HD Graphics 510 @ 0.90 GHz |
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AMD Ryzen 7 7840H
AMD Radeon 780M @ 2.70 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 Celeron 3855U
2C 2T @ 1.60 GHz |
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AMD Ryzen 7 7840H
8C 16T @ 4.25 GHz |
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Cinebench R23 (Single-Core)
Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
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Intel Celeron 3855U
2C 2T @ 1.60 GHz |
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AMD Ryzen 7 7840H
8C 16T @ 5.10 GHz |
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Cinebench R23 (Multi-Core)
Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
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Intel Celeron 3855U
2C 2T @ 1.60 GHz |
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AMD Ryzen 7 7840H
8C 16T @ 4.25 GHz |
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CPU-Z Benchmark 17 (Single-Core)
The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.
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Intel Celeron 3855U
2C 2T @ 1.60 GHz |
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AMD Ryzen 7 7840H
8C 16T @ 4.25 GHz |
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CPU-Z Benchmark 17 (Multi-Core)
The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.
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Intel Celeron 3855U
2C 2T @ 1.60 GHz |
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AMD Ryzen 7 7840H
8C 16T @ 3.80 GHz |
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Cinebench R15 (Single-Core)
Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
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Intel Celeron 3855U
2C 2T @ 1.60 GHz |
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AMD Ryzen 7 7840H
8C 16T @ 5.10 GHz |
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Cinebench R15 (Multi-Core)
Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
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Intel Celeron 3855U
2C 2T @ 1.60 GHz |
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AMD Ryzen 7 7840H
8C 16T @ 4.25 GHz |
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AI performance (NPU)
The performance values of the processor's AI unit. The isolated NPU performance is given here, the total AI performance (NPU+CPU+iGPU) can be higher.
Processors with the support of artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors. The performance is given in the number (trillions) of arithmetic operations per second (TOPS).
Processors with the support of artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors. The performance is given in the number (trillions) of arithmetic operations per second (TOPS).
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Intel Celeron 3855U
2C 2T @ 1.60 GHz |
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AMD Ryzen 7 7840H
8C 16T @ 3.80 GHz |
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Devices using this processor |
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| Intel Celeron 3855U | AMD Ryzen 7 7840H |
| Unknown | Unknown |
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