Qualcomm Snapdragon 821 vs AMD Ryzen 9 5900HS
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CPU comparison with benchmarks
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| Qualcomm Snapdragon 821 | AMD Ryzen 9 5900HS | |
CPU comparisonQualcomm Snapdragon 821 or AMD Ryzen 9 5900HS - 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 Qualcomm Snapdragon 821 has 4 cores with 4 threads and clocks with a maximum frequency of 2.40 GHz. Up to 8 GB of memory is supported in 2 memory channels. The Qualcomm Snapdragon 821 was released in Q3/2016. The AMD Ryzen 9 5900HS has 8 cores with 16 threads and clocks with a maximum frequency of 4.60 GHz. The CPU supports up to 64 GB of memory in 2 memory channels. The AMD Ryzen 9 5900HS was released in Q2/2021. |
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| Qualcomm Snapdragon (102) | Family | AMD Ryzen 9 (35) |
| Qualcomm Snapdragon 820 (3) | CPU group | AMD Ryzen 5000H (11) |
| 3 | Generation | 4 |
| Kryo | Architecture | Cezanne (Zen 3) |
| Mobile | Segment | Mobile |
| -- | Predecessor | -- |
| -- | Successor | AMD Ryzen 9 6900HS |
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CPU Cores and Base FrequencyThe Qualcomm Snapdragon 821 is a 4 core processor with a clock frequency of 2.40 GHz. The AMD Ryzen 9 5900HS has 8 CPU cores with a clock frequency of 3.00 GHz (4.60 GHz). |
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| Qualcomm Snapdragon 821 | Characteristic | AMD Ryzen 9 5900HS |
| 4 | Cores | 8 |
| 4 | Threads | 16 |
| hybrid (big.LITTLE) | Core architecture | normal |
| No | Hyperthreading | Yes |
| No | Overclocking ? | No |
| 2.40 GHz 2x Kryo |
A-Core | 3.00 GHz (4.60 GHz) |
| 1.60 GHz 2x Kryo |
B-Core | -- |
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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| Qualcomm Snapdragon 821 | Characteristic | AMD Ryzen 9 5900HS |
| Qualcomm AI engine | AI hardware | -- |
| Hexagon 680 | AI specifications | -- |
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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| Qualcomm Adreno 530 | GPU | AMD Radeon RX Vega 8 (Renoir) |
| 0.62 GHz | GPU frequency | 0.40 GHz |
| 0.62 GHz | GPU (Turbo) | 1.75 GHz |
| 5 | GPU Generation | 9 |
| 14 nm | Technology | 7 nm |
| 0 | Max. displays | 3 |
| -- | Compute units | 8 |
| 256 | Shader | 512 |
| No | Hardware Raytracing | No |
| No | Frame Generation | No |
| -- | Max. GPU Memory | 8 GB |
| 11,1 | 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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| Qualcomm Adreno 530 | GPU | AMD Radeon RX Vega 8 (Renoir) |
| Decode | Codec h265 / HEVC (8 bit) | Decode / Encode |
| No | Codec h265 / HEVC (10 bit) | Decode / Encode |
| Decode | Codec h264 | Decode / Encode |
| Decode | Codec VP9 | Decode / Encode |
| Decode | Codec VP8 | Decode / Encode |
| No | Codec AV1 | No |
| No | Codec AVC | Decode / Encode |
| Decode | Codec VC-1 | Decode |
| Decode | Codec JPEG | Decode / Encode |
Memory & PCIeThe Qualcomm Snapdragon 821 supports a maximum of 8 GB of memory in 2 memory channels. The AMD Ryzen 9 5900HS can connect up to 64 GB of memory in 2 memory channels. |
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| Qualcomm Snapdragon 821 | Characteristic | AMD Ryzen 9 5900HS |
| LPDDR4-3733 | Memory | LPDDR4-4266, DDR4-3200 |
| 8 GB | Max. Memory | 64 GB |
| 2 (Dual Channel) | Memory channels | 2 (Dual Channel) |
| 14.9 GB/s | Max. Bandwidth | 51.2 GB/s |
| No | ECC | No |
| -- | L2 Cache | 4.00 MB |
| -- | L3 Cache | 16.00 MB |
| -- | PCIe version | 3.0 |
| -- | PCIe lanes | 12 |
| -- | PCIe Bandwidth | 11.8 GB/s |
Thermal ManagementThe TDP (Thermal Design Power) of a processor specifies the required cooling solution. The Qualcomm Snapdragon 821 has a TDP of --, that of the AMD Ryzen 9 5900HS is 35 W. |
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| Qualcomm Snapdragon 821 | Characteristic | AMD Ryzen 9 5900HS |
| -- | TDP (PL1 / PBP) | 35 W |
| -- | TDP (PL2) | -- |
| -- | TDP up | 54 W |
| -- | TDP down | -- |
| -- | Tjunction max. | 105 °C |
Technical detailsThe Qualcomm Snapdragon 821 has a 0.00 MB cache, while the AMD Ryzen 9 5900HS cache has a total of 20.00 MB. |
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| Qualcomm Snapdragon 821 | Characteristic | AMD Ryzen 9 5900HS |
| 14 nm | Technology | 7 nm |
| Chiplet | Chip design | Chiplet |
| Armv8-A (64 bit) | Instruction set (ISA) | x86-64 (64 bit) |
| -- | ISA extensions | SSE4a, SSE4.1, SSE4.2, AVX2, FMA3 |
| -- | Socket | FP6 |
| None | Virtualization | AMD-V, SVM |
| No | AES-NI | Yes |
| Android | Operating systems | Windows 10, Windows 11, Linux |
| Q3/2016 | Release date | Q2/2021 |
| -- | Release price | -- |
| show more data | show more data | |
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8C 16T @ 3.00 GHz (4.60 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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Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz |
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AMD Ryzen 9 5900HS
8C 16T @ 4.60 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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Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz |
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AMD Ryzen 9 5900HS
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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Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz |
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AMD Ryzen 9 5900HS
8C 16T @ 4.60 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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Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz |
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AMD Ryzen 9 5900HS
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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Qualcomm Snapdragon 821
Qualcomm Adreno 530 @ 0.62 GHz |
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AMD Ryzen 9 5900HS
AMD Radeon RX Vega 8 (Renoir) @ 1.75 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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Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz |
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AMD Ryzen 9 5900HS
8C 16T @ 4.00 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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Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz |
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AMD Ryzen 9 5900HS
8C 16T @ 4.60 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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Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz |
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AMD Ryzen 9 5900HS
8C 16T @ 4.00 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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Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz |
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AMD Ryzen 9 5900HS
8C 16T @ 4.60 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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Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz |
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AMD Ryzen 9 5900HS
8C 16T @ 4.00 GHz |
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Blender 3.1 Benchmark
In the Blender Benchmark 3.1, the scenes "monster", "junkshop" and "classroom" are rendered and the time required by the system is measured. In our benchmark we test the CPU and not the graphics card. Blender 3.1 was presented as a standalone version in March 2022.
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Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz |
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AMD Ryzen 9 5900HS
8C 16T @ 4.00 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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Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz |
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AMD Ryzen 9 5900HS
8C 16T @ 3.00 GHz |
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Devices using this processor |
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| Qualcomm Snapdragon 821 | AMD Ryzen 9 5900HS |
| Unknown | Unknown |
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