Intel Atom C3858 vs AMD Ryzen 9 7940H
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CPU comparison with benchmarks
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| Intel Atom C3858 | AMD Ryzen 9 7940H | |
CPU comparisonIntel Atom C3858 or AMD Ryzen 9 7940H - 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 Atom C3858 has 12 cores with 12 threads and clocks with a maximum frequency of 2.00 GHz. Up to 256 GB of memory is supported in 2 memory channels. The Intel Atom C3858 was released in Q3/2017. The AMD Ryzen 9 7940H has 8 cores with 16 threads and clocks with a maximum frequency of 5.20 GHz. The CPU supports up to 256 GB of memory in 2 memory channels. The AMD Ryzen 9 7940H was released in Q1/2023. |
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| Intel Atom (108) | Family | AMD Ryzen 9 (37) |
| Intel Atom C3000 (20) | CPU group | AMD Ryzen 7040 (21) |
| 5 | Generation | 6 |
| Denverton | Architecture | Phoenix (Zen 4) |
| Desktop / Server | Segment | Mobile |
| -- | Predecessor | -- |
| -- | Successor | -- |
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CPU Cores and Base FrequencyThe Intel Atom C3858 is a 12 core processor with a clock frequency of 2.00 GHz. The AMD Ryzen 9 7940H has 8 CPU cores with a clock frequency of 4.00 GHz (5.20 GHz). |
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| Intel Atom C3858 | Characteristic | AMD Ryzen 9 7940H |
| 12 | Cores | 8 |
| 12 | Threads | 16 |
| normal | Core architecture | normal |
| No | Hyperthreading | Yes |
| No | Overclocking ? | No |
| 2.00 GHz | Frequency | 4.00 GHz |
| -- | Turbo Frequency (1 Core) | 5.20 GHz |
| -- | Turbo Frequency (All Cores) | -- |
Artificial Intelligence and Machine LearningProcessors 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. Algorithms for ML improve their performance the more data they have collected via software. ML tasks can be processed up to 10,000 times faster than with a classic processor. |
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| Intel Atom C3858 | Characteristic | AMD Ryzen 9 7940H |
| -- | AI hardware | AMD Ryzen AI |
| -- | AI specifications | AMD dedicated AI XDNA Technology |
Internal GraphicsThe 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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| no iGPU | GPU | AMD Radeon 780M |
| GPU frequency | 0.80 GHz | |
| -- | GPU (Turbo) | 2.80 GHz |
| -- | GPU Generation | 3 |
| Technology | 4 nm | |
| Max. displays | 4 | |
| -- | Compute units | 12 |
| -- | Shader | 768 |
| No | Hardware Raytracing | Yes |
| No | Frame Generation | AMD FSR |
| -- | Max. GPU Memory | 32 GB |
| -- | 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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| no iGPU | GPU | AMD Radeon 780M |
| No | Codec h265 / HEVC (8 bit) | Decode / Encode |
| No | Codec h265 / HEVC (10 bit) | Decode / Encode |
| No | Codec h264 | Decode / Encode |
| No | Codec VP9 | Decode |
| No | Codec VP8 | Decode |
| No | Codec AV1 | Decode / Encode |
| No | Codec AVC | Decode |
| No | Codec VC-1 | Decode |
| No | Codec JPEG | Decode / Encode |
Memory & PCIeThe Intel Atom C3858 supports a maximum of 256 GB of memory in 2 memory channels. The AMD Ryzen 9 7940H can connect up to 256 GB of memory in 2 memory channels. |
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| Intel Atom C3858 | Characteristic | AMD Ryzen 9 7940H |
| DDR4-2400 | Memory | DDR5-4800, DDR5-5600, LPDDR5-6400, LPDDR5X-7500 |
| 256 GB | Max. Memory | 256 GB |
| 2 (Dual Channel) | Memory channels | 2 (Dual Channel) |
| 38.4 GB/s | Max. Bandwidth | 120.0 GB/s |
| Yes | ECC | Yes |
| 12.00 MB | L2 Cache | 8.00 MB |
| -- | L3 Cache | 16.00 MB |
| 3.0 | PCIe version | 4.0 |
| 16 | PCIe lanes | 20 |
| 15.8 GB/s | PCIe Bandwidth | 39.4 GB/s |
Thermal ManagementThe TDP (Thermal Design Power) of a processor specifies the required cooling solution. The Intel Atom C3858 has a TDP of 25 W, that of the AMD Ryzen 9 7940H is 54 W. |
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| Intel Atom C3858 | Characteristic | AMD Ryzen 9 7940H |
| 25 W | TDP (PL1 / PBP) | 54 W |
| -- | TDP (PL2) | -- |
| -- | TDP up | -- |
| -- | TDP down | 35 W |
| 100 °C | Tjunction max. | 100 °C |
Technical detailsThe Intel Atom C3858 has a 12.00 MB cache, while the AMD Ryzen 9 7940H cache has a total of 24.00 MB. |
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| Intel Atom C3858 | Characteristic | AMD Ryzen 9 7940H |
| 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 |
| BGA 1310 | 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 |
| Q3/2017 | Release date | Q1/2023 |
| 332 $ | 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 Atom C3858
12C 12T @ 2.00 GHz |
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AMD Ryzen 9 7940H
8C 16T @ 5.20 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 Atom C3858
12C 12T @ 2.00 GHz |
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AMD Ryzen 9 7940H
8C 16T @ 4.00 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 Atom C3858
12C 12T @ 2.00 GHz |
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AMD Ryzen 9 7940H
8C 16T @ 5.20 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 Atom C3858
12C 12T @ 2.00 GHz |
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AMD Ryzen 9 7940H
8C 16T @ 4.00 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 Atom C3858
@ 0.00 GHz |
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AMD Ryzen 9 7940H
AMD Radeon 780M @ 2.80 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 Atom C3858
12C 12T @ 2.00 GHz |
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AMD Ryzen 9 7940H
8C 16T @ 4.00 GHz |
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Performance for Artificial Intelligence (AI) and Machine Learning (ML)
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 Atom C3858
12C 12T @ 2.00 GHz |
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AMD Ryzen 9 7940H
8C 16T @ 4.00 GHz |
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Devices using this processor |
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| Intel Atom C3858 | AMD Ryzen 9 7940H |
| Unknown | Unknown |
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