Intel Atom C3858 vs AMD Ryzen 5 8645HS
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CPU comparison with benchmarks
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| Intel Atom C3858 | AMD Ryzen 5 8645HS | |
CPU comparisonIntel Atom C3858 or AMD Ryzen 5 8645HS - 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 5 8645HS has 6 cores with 12 threads and clocks with a maximum frequency of 5.00 GHz. The CPU supports up to 256 GB of memory in 2 memory channels. The AMD Ryzen 5 8645HS was released in Q1/2024. |
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| Intel Atom (108) | Family | AMD Ryzen 5 (86) |
| Intel Atom C3000 (20) | CPU group | AMD Ryzen 8040 (20) |
| 5 | Generation | 7 |
| Denverton | Architecture | Hawk Point (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 5 8645HS has 6 CPU cores with a clock frequency of 4.30 GHz (5.00 GHz). |
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| Intel Atom C3858 | Characteristic | AMD Ryzen 5 8645HS |
| 12 | Cores | 6 |
| 12 | Threads | 12 |
| normal | Core architecture | normal |
| No | Hyperthreading | Yes |
| No | Overclocking ? | No |
| 2.00 GHz | Frequency | 4.30 GHz |
| -- | Turbo Frequency (1 Core) | 5.00 GHz |
| -- | Turbo Frequency (All Cores) | -- |
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 Atom C3858 | Characteristic | AMD Ryzen 5 8645HS |
| -- | AI hardware | AMD Ryzen™ AI |
| -- | AI specifications | AMD Ryzen™ AI (XDNA) @ 16 TOPS |
| -- | NPU + CPU + iGPU | -- |
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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| no iGPU | GPU | AMD Radeon 760M |
| GPU frequency | 0.80 GHz | |
| -- | GPU (Turbo) | 2.60 GHz |
| -- | GPU Generation | 10 |
| Technology | 4 nm | |
| Max. displays | 4 | |
| -- | Compute units | 8 |
| -- | Shader | 512 |
| 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 760M |
| 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 5 8645HS can connect up to 256 GB of memory in 2 memory channels. |
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| Intel Atom C3858 | Characteristic | AMD Ryzen 5 8645HS |
| 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 | 6.00 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 5 8645HS is 45 W. |
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| Intel Atom C3858 | Characteristic | AMD Ryzen 5 8645HS |
| 25 W | TDP (PL1 / PBP) | 45 W |
| -- | TDP (PL2) | -- |
| -- | TDP up | 54 W |
| -- | 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 5 8645HS cache has a total of 22.00 MB. |
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| Intel Atom C3858 | Characteristic | AMD Ryzen 5 8645HS |
| 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 | Q1/2024 |
| 332 $ | Release price | -- |
| show more data | show more data | |
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Rate these processors
Cinebench 2024 (Single-Core)
The Cinebench 2024 benchmark is based on the Redshift rendering engine, which is also used in Maxon's 3D program Cinema 4D. The benchmark runs are each 10 minutes long to test whether the processor is limited by its heat generation.
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Intel Atom C3858
12C 12T @ 2.00 GHz |
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AMD Ryzen 5 8645HS
6C 12T @ 5.00 GHz |
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Cinebench 2024 (Multi-Core)
The Multi-Core test of the Cinebench 2024 benchmark uses all cpu cores to render using the Redshift rendering engine, which is also used in Maxons Cinema 4D. The benchmark run is 10 minutes long to test whether the processor is limited by its heat generation.
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Intel Atom C3858
12C 12T @ 2.00 GHz |
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AMD Ryzen 5 8645HS
6C 12T @ 5.00 GHz |
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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 5 8645HS
6C 12T @ 5.00 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 5 8645HS
6C 12T @ 4.30 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 5 8645HS
6C 12T @ 5.00 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 5 8645HS
6C 12T @ 4.30 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 5 8645HS
AMD Radeon 760M @ 2.60 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 Atom C3858
12C 12T @ 2.00 GHz |
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AMD Ryzen 5 8645HS
6C 12T @ 4.30 GHz |
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Devices using this processor |
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| Intel Atom C3858 | AMD Ryzen 5 8645HS |
| Unknown | Unknown |
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