AMD A8-3870K vs AMD Ryzen 9 7845HX
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CPU comparison with benchmarks
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| AMD A8-3870K | AMD Ryzen 9 7845HX | |
CPU comparisonAMD A8-3870K or AMD Ryzen 9 7845HX - 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 AMD A8-3870K has 4 cores with 4 threads and clocks with a maximum frequency of 3.10 GHz. Up to GB of memory is supported in 2 memory channels. The AMD A8-3870K was released in Q4/2011. The AMD Ryzen 9 7845HX has 12 cores with 24 threads and clocks with a maximum frequency of 5.20 GHz. The CPU supports up to 128 GB of memory in 2 memory channels. The AMD Ryzen 9 7845HX was released in Q1/2023. |
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| AMD A (112) | Family | AMD Ryzen 9 (40) |
| AMD A8-3000 (4) | CPU group | AMD Ryzen 7045 (6) |
| 1 | Generation | 6 |
| Llano (K10) | Architecture | Dragon Range (Zen 4) |
| Desktop / Server | Segment | Mobile |
| -- | Predecessor | -- |
| -- | Successor | -- |
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CPU Cores and Base FrequencyThe AMD A8-3870K has 4 CPU cores and can calculate 4 threads in parallel. The clock frequency of the AMD A8-3870K is 3.10 GHz while the AMD Ryzen 9 7845HX has 12 CPU cores and 24 threads can calculate simultaneously. The clock frequency of the AMD Ryzen 9 7845HX is at 3.00 GHz (5.20 GHz). |
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| AMD A8-3870K | Characteristic | AMD Ryzen 9 7845HX |
| 4 | Cores | 12 |
| 4 | Threads | 24 |
| normal | Core architecture | normal |
| No | Hyperthreading | Yes |
| Yes | Overclocking ? | Yes |
| 3.10 GHz | Frequency | 3.00 GHz |
| -- | Turbo Frequency (1 Core) | 5.20 GHz |
| -- | Turbo Frequency (All Cores) | -- |
Integrated graphics (iGPU)The AMD A8-3870K or AMD Ryzen 9 7845HX 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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| AMD Radeon HD 6550D | GPU | AMD Radeon 610M |
| 0.60 GHz | GPU frequency | 0.40 GHz |
| -- | GPU (Turbo) | 2.20 GHz |
| 3 | GPU Generation | 9 |
| 32 nm | Technology | 6 nm |
| 2 | Max. displays | 3 |
| 5 | Compute units | 2 |
| 400 | Shader | 128 |
| No | Hardware Raytracing | Yes |
| No | Frame Generation | No |
| 1 GB | Max. GPU Memory | 8 GB |
| 11 | 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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| AMD Radeon HD 6550D | GPU | AMD Radeon 610M |
| No | Codec h265 / HEVC (8 bit) | Decode / Encode |
| No | Codec h265 / HEVC (10 bit) | Decode / Encode |
| Decode | Codec h264 | Decode / Encode |
| No | Codec VP9 | Decode / Encode |
| No | Codec VP8 | Decode / Encode |
| No | Codec AV1 | Decode |
| Decode | Codec AVC | Decode / Encode |
| Decode | Codec VC-1 | Decode |
| Decode / Encode | Codec JPEG | Decode / Encode |
Memory & PCIeThe AMD A8-3870K can use up to GB of memory in 2 memory channels. The maximum memory bandwidth is 25.6 GB/s. The AMD Ryzen 9 7845HX supports up to 128 GB of memory in 2 memory channels and achieves a memory bandwidth of up to 83.2 GB/s. |
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| AMD A8-3870K | Characteristic | AMD Ryzen 9 7845HX |
| DDR3-1600 | Memory | DDR5-5200 |
| Max. Memory | 128 GB | |
| 2 (Dual Channel) | Memory channels | 2 (Dual Channel) |
| 25.6 GB/s | Max. Bandwidth | 83.2 GB/s |
| No | ECC | Yes |
| -- | L2 Cache | 12.00 MB |
| 4.00 MB | L3 Cache | 64.00 MB |
| -- | PCIe version | 5.0 |
| -- | PCIe lanes | 28 |
| -- | PCIe Bandwidth | 110.3 GB/s |
Thermal ManagementThe thermal design power (TDP for short) of the AMD A8-3870K is 100 W, while the AMD Ryzen 9 7845HX has a TDP of 55 W. The TDP specifies the necessary cooling solution that is required to cool the processor sufficiently. |
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| AMD A8-3870K | Characteristic | AMD Ryzen 9 7845HX |
| 100 W | TDP (PL1 / PBP) | 55 W |
| -- | TDP (PL2) | -- |
| -- | TDP up | 75 W |
| -- | TDP down | 45 W |
| -- | Tjunction max. | 100 °C |
Technical detailsThe AMD A8-3870K is manufactured in 32 nm and has 4.00 MB cache. The AMD Ryzen 9 7845HX is manufactured in 5 nm and has a 76.00 MB cache. |
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| AMD A8-3870K | Characteristic | AMD Ryzen 9 7845HX |
| 32 nm | Technology | 5 nm |
| Unknown | Chip design | Chiplet |
| x86-64 (64 bit) | Instruction set (ISA) | x86-64 (64 bit) |
| SSE3, SSE4a | ISA extensions | SSE4a, SSE4.1, SSE4.2,FMA3, AVX2, AVX512 |
| FM1 | Socket | FL1 |
| AMD-V | Virtualization | AMD-V, SVM |
| No | AES-NI | Yes |
| Windows 10, Linux | Operating systems | Windows 10, Windows 11, Linux |
| Q4/2011 | Release date | Q1/2023 |
| 80 $ | Release price | -- |
| show more data | show more data | |
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Rate these processors
Average performance in benchmarks
⌀ Single core performance in 0 CPU benchmarks
⌀ Multi core performance in 1 CPU benchmarks
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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AMD A8-3870K
AMD Radeon HD 6550D @ 0.60 GHz |
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AMD Ryzen 9 7845HX
AMD Radeon 610M @ 2.20 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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AMD A8-3870K
4C 4T @ 3.10 GHz |
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AMD Ryzen 9 7845HX
12C 24T @ 3.00 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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AMD A8-3870K
4C 4T @ 3.10 GHz |
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AMD Ryzen 9 7845HX
12C 24T @ 5.20 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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AMD A8-3870K
4C 4T @ 3.10 GHz |
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AMD Ryzen 9 7845HX
12C 24T @ 3.00 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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AMD A8-3870K
4C 4T @ 3.10 GHz |
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AMD Ryzen 9 7845HX
12C 24T @ 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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AMD A8-3870K
4C 4T @ 3.10 GHz |
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AMD Ryzen 9 7845HX
12C 24T @ 3.00 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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AMD A8-3870K
4C 4T @ 3.10 GHz |
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AMD Ryzen 9 7845HX
12C 24T @ 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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AMD A8-3870K
4C 4T @ 3.10 GHz |
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AMD Ryzen 9 7845HX
12C 24T @ 3.00 GHz |
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Cinebench R20 (Single-Core)
Cinebench R20 is the successor of Cinebench R15 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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AMD A8-3870K
4C 4T @ 3.10 GHz |
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AMD Ryzen 9 7845HX
12C 24T @ 5.20 GHz |
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Cinebench R20 (Multi-Core)
Cinebench R20 is the successor of Cinebench R15 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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AMD A8-3870K
4C 4T @ 3.10 GHz |
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AMD Ryzen 9 7845HX
12C 24T @ 3.00 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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AMD A8-3870K
4C 4T @ 3.10 GHz |
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AMD Ryzen 9 7845HX
12C 24T @ 5.20 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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AMD A8-3870K
4C 4T @ 3.10 GHz |
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AMD Ryzen 9 7845HX
12C 24T @ 3.00 GHz |
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CPU performance per watt (efficiency)
Efficiency of the processor under full load in the Cinebench R23 (multi-core) benchmark. The benchmark result is divided by the average energy required (CPU package power in watts). The higher the value, the more efficient the CPU is under full load.
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AMD A8-3870K
3.10 GHz |
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AMD Ryzen 9 7845HX
26,654 CB R23 MC @ 102 W |
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Devices using this processor |
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| AMD A8-3870K | AMD Ryzen 9 7845HX |
| Unknown | Unknown |
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